End of civilization: climate change apocalypse could start by 2050 if we don't act, report warns
USA Today, June 6, 2019
A chilling Australian policy paper outlining a Doomsday scenario for humans if we don’t start dealing with climate change suggests that by 2050 we could see irreversible damage to global climate systems resulting in a world of chaos where political panic is the norm and we are on a path facing the end of civilization.
The worst thing about it, say experts, is that it’s actually a fairly calm and rational look at just how bad things could get — and how quickly — if humans don’t stop emitting greenhouse gases into the environment.
The scenarios "don't seem that far-fetched to me. I don't think there's anything too crazy about them," said Adam Sobel, a professor of applies physics and mathematics at Columbia University in New York City who studies atmospheric and climate dynamics.
The paper was written by an independent think-tank in Australia called Breakthrough National Centre for Climate Restoration. It offer a scenario for 2050 in a world where humans didn't lower carbon emissions enough to keep the global temperature from rising.
Last year's United Nation's Intergovernmental Panel on Climate Change report said the world’s nations must quickly reduce fossil fuel use to keep the rise in global temperatures below 1.5 degrees Celsius. The transitions, the report said, must start now and be well underway in the next 20 years.
In the years leading up to 2050, policy-makers fail to cut greenhouse gas emissions. The case for the global climate-emergency mobilization necessary to keep temperatures from rising is "politely ignored." Global greenhouse gas emissions peak in 2030 and begin to fall due to a drop in fossil fuel use but damage has been done and warming reaches 3 degrees Celsius.
By 2050, sea levels have risen 1.6 feet and are projected to increase by as much as 10 feet by 2100.
Globally, 55% of the population lives in areas subject to more than 20 days of lethal heat a year, beyond the human threshold of survivability.
North America suffers from devastating weather extremes including wildfires, heatwaves, droughts and flooding. China's summer monsoons fail and water in Asia's great rivers are severely reduced from the loss of more than one-third of the Himalayan ice sheet.