The science is clear: It is understood that we are facing an unprecedented global emergency. We are in a life or death situation of our own making. We must act now.
“We are in a planetary emergency” Prof. James Hansen, former Director of the NASA Goddard Institute for Space Studies
“Climate change is a medical emergency…It thus demands an emergency response…” Prof. Hugh Montgomery, director of the University College London Institute for Human Health and Performance, Lancet Commission Co-Chair
“This is an emergency and for emergency situations we need emergency action.” – Ban Ki-Moon, former UN Secretary General
Human activity is causing irreparable harm to the life on this world. A mass extinction event is underway. Many current life forms could be annihilated or at least committed to extinction by the end of this century.
The air we breathe, the water we drink, the earth we plant in, the food we eat, and the beauty and diversity of nature that nourishes our psychological well-being, all are being corrupted and compromised by the political and economic systems that promote and support our modern, consumer-focussed lifestyles.
We must act while we still can. What we are seeing now is nothing compared to what could come.
Effects on global human society, if the climate and ecological emergency is not addressed in time, may spiral out of control.
- Sea level rise
- Water shortage
- Crop failure
- Extreme weather
- Millions displaced
- Increased risk of wars and conflicts
But our leaders are failing in their duty to act on our behalf. Our current systems of governance are compromised by a focus on profits and economic growth. Politicians can be influenced by lobbies of powerful corporations and the media are hampered by vested interest of corporate advertisers undermining our democratic values.
We have run out of the luxury of time to react incrementally.
We must radically and immediately begin reducing emissions and improving carbon absorption, drawing it down and locking it up again. We must also put a stop to the industries devastating marine and terrestrial habitats in recognition that biodiversity is essential for all life to persist.
Only a peaceful planet-wide mobilisation of the scale of World War II will give us a chance to avoid the worst case scenarios and restore a safe climate.
The task before us is daunting but big changes have happened before.
Let’s make a better world.
We’ve been warned again and again…and again
In 1992, the Union of Concerned Scientists including the majority of living science Nobel laureates, penned the “World Scientists’ Warning to Humanity”calling on humankind to curtail environmental destruction and warning that “a great change in our stewardship of the Earth and the life on it is required, if vast human misery is to be avoided.” They showed that humans were on a collision course with the natural world. They proclaimed that fundamental changes were urgently needed to avoid the consequences our present course would bring.
The authors of the 1992 declaration feared that humanity was pushing Earth’s ecosystems beyond their capacities to support the web of life. They described how we are fast approaching many of the limits of what the biosphere can tolerate without substantial and irreversible harm. They implored that we cut greenhouse gas (GHG) emissions and phase out fossil fuels, reduce deforestation, and reverse the trend of collapsing biodiversity.
In 2017, humanity was given a second notice. Over 15,000 scientists signed a new and even more urgently worded letter which warned that “To prevent widespread misery and catastrophic biodiversity loss, humanity must practice a more environmentally sustainable alternative to business as usual. This prescription was well articulated by the world’s leading scientists 25 years ago, but in most respects, we have not heeded their warning. Soon it will be too late to shift course away from our failing trajectory, and time is running out. We must recognize, in our day-to-day lives and in our governing institutions, that Earth with all its life is our only home.”
At the end of 2018, the UN Secretary General warned us:
- Humanity and life on Earth now face a ‘direct existential threat’
- The world must act swiftly and robustly to keep global warming under 1.5°C and try to avoid utterly catastrophic impacts to life on Earth.
This is our final notice – we must act now.
Our carbon emissions are still increasing!
“More than half of all industrial emissions of carbon dioxide since the dawn of the Industrial Revolution will have been released since 1988” – Dr. Peter C. Frumhoff, Director of science and policy at the Union of Concerned Scientists
Carbon dioxide concentrations are at a record high of 411 parts per million (ppm)(an increase of over 45% on pre-industrial levels). Concentrations are now at the highest levels in at least the last 3 million years (i.e. since before modern humans had even evolved on this planet)
To stabilise temperatures net-emissions need to reach zero! The longer we delay the harder it becomes. Unfortunately, because of years of delay and inaction we have reached a crisis where we will only to meet our targets if we to take urgent emergency action!
Our house is on fire.
Human activities have caused the planet’s average surface temperature to rise about 1.1°Csince the late 19th century. Most of the warming occurred in the past 35 years.
As the global temperatures rises we see an increase in extreme weather events such as heatwaves and droughts. For example, scientists from the UK Met Office who examined the extreme heat wave which struck Europe in the summer of 2003 (which is now known to have killed 70,00 people) concluded that “it is very likely…that human influence has at least doubled the risk of a heatwave exceeding this threshold magnitude.” If we carry on burning fossil fuels, such an extreme heatwave will become an average summer for Europe by 2040 and almost all summers will be hotter than that by 2060! As shown in this graph…
A 2018 study shows how deadly heat waves may limit habitability of one of the world’s most populous regions in the world. Concluding that continued burning of fossil fuels would lead to lead to heat extremes that exceeded “the threshold defining what Chinese farmers may tolerate while working outdoors.”
Climate change in your lifetime…
All forms of pollution were responsible in 2015 for an estimated 9 million premature deaths—16% of all deaths worldwide. Pollution is thus the world’s largest environmental cause of disease and premature death.
The vast majority of these deaths are due to exposure to air pollution. mostly from small particles that can penetrate deep into the lungs (known as PM2.5). Young children, those with preexisting health conditions such as asthma and old people are particularly vulnerable. In total, nine out of ten people now breathe polluted air, mostly in low-middle income countries.
It is not just pollution from cars and industry that are causing this health crisis, poor indoor air quality is also deadly. In half the world, this is due to having no access to clean fuels or electricity, and so have to rely on inefficient solid-fuel burning stoves and kerosene lamps technologies Globally, 9/10 people now breathe polluted air which kills 7 million people every year. (Ambient air pollution: 4.2 million deaths; household air pollution: 2.8 million deaths)
Nature: The Biosphere
The Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES) report produced in 2019 shows the biodiversity crisis is on a par with the threat posed by climate change. We are part of the natural world and we depend on it to stay alive.
A “biological annihilation” of wildlife in recent decades means the Sixth Mass Extinction in Earth’s history is under way.
Looking at the UK for example, the 2016 State of Nature report found that they were “among the most nature-depleted countries in the world”. One in five British mammals are at risk of being lost from the countryside with the populations of hedgehogs and water voles declining by almost 70% in just the past 20 years. Whilst another new report by the British Trust for Ornithology found that more than a quarter of British bird species are threatened, including the Puffin, the Nightingale and Curlew. Across Europe the abundance of farmland birds has fallen by 55%in just the past three decades!
Globally species are going extinct at rates up to 1,000 times the background rates typical of Earth’s past. The direct causes of biodiversity loss being habitat change, overexploitation, the introduction of invasive alien species, nutrient loading and climate change.
The latest Living Planet Index shows an average decline of 60% in population sizes of thousands of vertebrate species around the world between 1970 and 2014.
More than a quarter of species assessed by the IUCN (around 100,000) are threatened with extinction. That is 40% of all amphibians, 25% of all mammals, 34% of all conifers, 14% of all birds, 33% of reef-building corals, 31% of sharks and rays.
Corals reefs are suffering mass die-offs from heat stress. These events are becoming much more common with back to back die-offs on the Great Barrier Reef in Australia in 2016 and 2017. The predictions are that at just 2C of warming above pre-industrial temperatures these heat waves will occur on an annual basis and coral reefs would become functionally extinct.
“20 years from now, every summer will be too hot for corals: they will disappear as dominant members of tropical reef systems by 2040-2050. It’s hard to argue it any other way.” – Prof. Ove Hoegh-Guldberg directs the Global Change Institute at the University of Queensland.
Catastrophic reductions in global insect populations have profound consequences for ecological food chains and human crop pollination.
There is strong evidencethat many insect populations are under serious threat and are declining in many places across the globe. Multiple pressures might include habitat loss, agro-chemical pollutants, invasive species and climate change.
A 27-year long population monitoringstudy in Germany revealed a dramatic 76% decline in flying insect biomass.
And a new study by Dutch scientists found that Butterfly numbers had fallen by over 80% in the last 130 years. With the authors concluding that “industrial agriculture is simply leaving hardly any room for nature.”
“It should be of huge concern to all of us, for insects are at the heart of every food web, they pollinate the large majority of plant species, keep the soil healthy, recycle nutrients, control pests, and much more. Love them or loathe them, we humans cannot survive without insects.”Prof Dave Goulson, The University of Sussex
One of the world’s leading medical journals, The Lancet, carried out a major review which concluded that climate changed posed “the biggest global health threat of the 21st century” because of both the direct impacts of extreme weather events and the indirect disruption to the social and ecological systems that sustain us.
More frequent and severe water extremes, including droughts and floods, impact agricultural production, while rising temperatures translate into increased water demand in agriculture sectors.
“We have already observed impacts of climate change on agriculture. We have assessed the amount of climate change we can adapt to. There’s a lot we can’t adapt to even at 2ºC. At 4ºC the impacts are very high and we cannot adapt to them” – Dr. Rachel Warren, University of East Anglia.
The number of extreme climate-related disasters, including extreme heat, droughts, floods and storms, has doubled since the early 1990s, with an average of 213 of these events occurring every year during the period of 1990–2016. These harm agricultural productivity contributing to shortfalls in food availability, with knock-on effects causing food price hikes and income losses that reduce people’s access to food.
People across 51 countries and territories facing crisis levels of acute food insecurity or worse, requiring immediate emergency action
- 2015: 80 million people
- 2016: 108 million people
- 2017: 124 million people
Risk of extreme weather hitting several major food producing regions of the world at the same time could triple by 2040 (1 in 100 year event to 1 in 30).
A recent study looking at the impact of climate change on food production for the top four maize-exporting countries, which currently account for over 85% of global maize exports, found that “the probability that they have simultaneous production losses greater than 10% in any given year is presently virtually zero, but it increases to 7% under 2°C warming and 86% under 4°C warming “
Drought and Scarcity
Water withdrawals grew at almost twice the rate of population increase in the twentieth century.
The global water cycle is intensifying due to climate change, with wetter regions generally becoming wetter and drier regions becoming even drier. A 2018 UN report highlights that at present, an estimated 3.6 billion people (nearly half the global population) live in areas that are potentially water-scarce at least one month per year, and this population could increase to some 4.8–5.7 billion by 2050.
Rising temperatures will melt at least one-third of the Himalayas’ glaciers by the end of the century even if we limit the temperature rise to 1.5°C. Melting glaciers in both the Andes and the Himalayas threatens the water supplies of hundreds of millions people living downstream.
A severe drought in Cape Town in 2018 led to severe water restrictions being put in place. The city came to within just days of turning off its water supply – dubbed ‘Day Zero’. Climate scientists have now calculated that climate change has already made a drought this severity go from a one in 300 year event to being a one in a hundred year event. At 2°C of warming a drought of this severity will happen roughly once every 33 years.
Sea level is rising faster in recent decades. Sea level rise is caused primarily by two factors related to global warming: the added water from melting ice sheets and glaciers and the expansion of seawater as it warms. Sea level rises will cause inundation of low lying land, islands and coastal cities globally.
As sea level rises higher over the next 15 to 30 years, tidal flooding is expected to occur much more often, causing severe disruption to coastal communities, and even rendering some areas unusable — all within the time frame of a typical home mortgage.
2°C warming would threaten to inundate areas now occupied by 130 million peoplewhile increase to 4°C could lock in enough eventual sea level rise to submerge land currently home to 470 to 760 million people globally.
The land ice sheets in both Antarctica and Greenland have been losing mass since 2002. Both ice sheets have seen an acceleration of ice mass loss since 2009. Antarctica is losing six times more ice mass annually now than 40 years ago.
In 2014 a team from NASA found that part of the West Antarctic ice sheet had already begun what they described as an “unstoppable” collapse, locking in at least a meter of sea level rise. If we continue warming we will trigger the collapse of more sectors of the ice-sheets.
“Sea level is rising much faster and Arctic sea ice cover shrinking more rapidly than we previously expected. Unfortunately, the data now show us that we have underestimated the climate crisis in the past.” Stefan Rahmstorf, Professor of Physics of the Oceans
The oceans are already become 30% more acidic, as carbon dioxide from the burning of fossil fuels dissolves it alters the chemistry of the sea water. On our current emission trajectory, in 2100, the pH increase of the ocean will see a 150% increase in acidity! This will affect marine life from shellfish to whole coral reef communities by removing needed minerals that they use to grow their shells. The oceanic conditions will be unlike marine ecosystems have experienced for the last 14 million years
Present ocean acidification is occurring approximately ten times faster than anything experienced during the last 300 million years, jeopardising the ability of ocean systems to adapt.
Arctic sea ice is now declining at a rate of 12.8 percent per decade.
Summer Arctic sea ice is predicted to disappear almost completely by the middle of this century.
“We may lose the summer ice cover as early as 2030. This is in itself much earlier than projections from nearly all climate model simulations.” – Prof. Mark Serreze, Director of the National Snow and Ice Data Centre
Scientists are now investigating connections between the huge changes we have seen in the Arctic and changes to the jet stream resulting in increasingly dramatic impacts on extreme weather events at lower latitudes.
Nitrate from agriculture is now the most common chemical contaminant in the world’s groundwater aquifers. These pollutants can also dramatically affect aquatic ecosystems, for example, through eutrophication caused by the accumulation of nutrients in lakes and coastal waters impacts biodiversity and fisheries. Ocean dead zones with zero oxygen havequadrupled in size since 1950, suffocating the organisms that live in those areas.
We’re losing our soil
More than 95% of what we eat comes from soil.It takes about 500 years to form 2.5 cm of top soilunder normal agricultural condition. Soil erosion and degradation has been increased dramatically by the human activities of deforestation for agriculture, overgrazing and use of agrochemicals.
50% of the planet’s topsoil has been lost in the last 150 years, leading to increased pollution, flooding and desertification. Desertification itself currently affects more than 2.7 billion people
By 2050, land degradation and climate change together are predicted to reduce crop yields by an average of 10 per cent globally and up to 50 per cent in certain regions. Earthworms cannot compensate for the loss of topsoil as they too are being depleted by 80% or more from intensive agrichemical fields. Several species of worms are extinct and many others are heading that way.
Current agricultural practices have led our soils to become more acidic, pH globally has acidified by an average of 0.26 in 20 years. Meanwhile groundwater irrigation is leading to increased salinity with recent projections warning that50% of all arableland will become impacted by salinity by 2050
Faster than expected
The published science tends to underestimate the severity of threats and the rapidity with which they might unfold.
“Climate change is accelerating more rapidly and dangerously than most of us in the scientific community had expected or that the IPCC in its 2007 Report presented.” Sir John Haughton, Former Co-Chair of the Intergovernmental Panel on Climate Change (IPCC), Former Director General of the UK Met Office – 2008
“Everything that is expected to result from global climate change driven by greenhouse gases is not only happening, but it’s happening faster than anybody expected” John Holdren, Science and Technology advisor to President Barack Obama, director of the Woods Hole Research Center – 2010
“We are seeing increases in extreme weather events that go well beyond what has been predicted or projected in the past. We’re learning that there are factors we were not previously aware of that may be magnifying the impacts of human-caused climate change… Increasingly, the science suggests that many of the impacts are occurring earlier and with greater amplitude than was predicted” Michael Mann, Penn State – 2017
**We don’t have 30 years to turn this around. Reasons why 2050 is NOT what we are asking for. **
There are no guarantees with something as complex as predicting the effects of changes to the climate. Setting a distant target date is like trying to calculate exactly when you should step in while watching a group of small children playing near a cliff edge. When disaster is an imminent possibility you don’t calculate how long you can leave it before acting, you do everything you can to intervene, starting immediately – this is what is known as the Precautionary Principle. The longer we wait to take profound and sweeping action, the greater the risk that we trigger feedback loops and start down an irreversible pathway towards a “Hothouse Earth”.
It’s clear that we should never have allowed things to get so bad. It’s even worse when we realise that over half of all emissions in history have happened in the last 25 years, while our governments have been talking about dealing with the problem. The government cannot be allowed to continue to kick the ball into the long grass by setting the date for decarbonisation at 2050. We need to start acting now. The 2025 target forces us to do that, whereas 2050 condemns us to a bleak future.
The faster we act the better. We are already too late to prevent massive destruction and loss of life. Climate-breakdown-induced Droughts, floods, wildfires, typhoons and cyclones made more frequent and severe by our way of life are killing people and destroying communities right now.The question now is whether we can act in time to limit the damage – and hopefully avoid the horror of the worst case scenarios. Most evidence suggests we still just about have time. 2050 is a generation too late. That would be unforgivable, and very likely utterly catastrophic.