In 1990, scientists from around the world published a report that spelled out that the climate was changing and that we — human beings — were the cause.
If we continued polluting, with business as usual …
"Emissions of greenhouse gases … will result in a likely increase in global mean temperature of about 1 degree Celsius above the present value by 2025, and 3C before the end of the next century. The rise will not be steady."
