Based on geological history, the Earth would be expected to enter a new ice age in 10,000 to 100,000 years. Researchers say even small changes in carbon dioxide levels right now could prevent this from happening. They tell the journal Nature this may not be good news as the planet could change in ways that are unprecedented.
… “In the last 100,000 years, global CO2 levels increased by around 1.5 parts per million – but now we put out this much every year. The natural process is 100,000 times slower than the way humankind is changing CO2 levels,” he says.
… Professor Crowley warns against seeing increases in carbon dioxide levels as a good thing and adds that we might end up with a planet completely different from anything we’ve ever known. – bbc