Click through the gallery for a look at 10 other key effects of climate change, some of which may surprise you. Click through the gallery for a look at 10 other key effects of climate change, some of which may surprise you. Willeit said that according to the simulation CO2 levels should not be higher than 280 parts per million (ppm) without human activity, but that they are currently 410 ppm and rising. Into unknown territoryWilleit said rising CO2 levels are pushing earth beyond any climatic conditions ever experienced by humans. If CO2 levels and temperatures continue to rise, "our planet will change" and sea levels will rise by one or two meters in the next 200 years, he added.

Source: CNN April 04, 2019 14:26 UTC