Oh, boy… Heatwaves would be off the charts, perhaps 9°C warmer than heatwaves today . Wildfires would destroy large portions of forests, and droughts would cause more crops to fail . Poor people would suffer the most from worsening droughts . Without being able to produce food, people would be forced to move to cooler areas . Migration of people in large numbers increases the chance of conflict, so rapid climate change could spark wars .
Sea levels would be at least 0.5 to 1m higher , but it could be several times this  because we don’t know how much ice will melt [2,14]! Hundreds of cities will be affected , and some would have to relocate . Flooding could ruin agricultural land, and threaten food security .
What about nature? At the moment, the main driver of animal and plant species loss is destruction of habitat by humans, followed by hunting and fishing . But with 4°C of warming, climate change would become the main threat, and would cause loss of nature on a huge scale . Many animals and plants would go extinct . Coral reefs would be long-gone . Much of the Amazon rainforest would dry out and turn into savanna .
Will this happen? If we don’t act more seriously against global warming, yes, it is expected to happen around the year 2100 . These temperatures have not been seen in over 5 million years . At this time, there were no humans , and the climate was completely different to today .
To prevent this from becoming a reality, we need to make changes: reduce your carbon footprint, share your knowledge with others, and use your career to tackle climate change!
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