Climate change could pose 'existential threat' by 2050: report; CNN
The future predicted by the report is one of potential global catastrophe.
Authors David Spratt and Ian Dunlop, both longtime climate researchers, warn that climate change at present poses a "near-to-mid-term existential threat to human civilization."
They drew on existing scientific research and "scenario planning" to forecast that if global temperatures rise 3 degrees Celsius by 2050, 55% of the world's population across 35% of its land area would experience more than 20 days of lethal heat per year, "beyond the threshold of human survivability."
In that scenario, many ecosystems -- including those in the Arctic, the Amazon rainforest and the coral reef systems -- would collapse.
Across West Africa, tropical South America, the Middle East and Southeast Asia, there would be more than 100 days a year of deadly heat, leading to over 1 billion people being displaced.
Food production would drop off due to the "catastrophic decline" in insect populations, weather too hot for humans to survive in significant food-growing areas and chronic water shortages. With not enough food for the world's population, prices would skyrocket, the paper's authors argue.
Rising sea levels would cause people to abandon parts of Mumbai, Jakarta, Guangzhou, Hong Kong, Ho Chi Minh City, Shanghai, Bangkok and Manila, among other cities. Around 15 million people in Bangladesh would be displaced.
"The social consequences range from increased religious fervor to outright chaos," the paper said. "In this scenario, climate change provokes a permanent shift in the relationship of humankind to nature."
https://www.cnn.com/2019/06/04/health/c ... index.html