Global warming is the long-term increase in the average temperature of the Earth's climate system. It is a primary aspect of current climate change, demonstrated by direct measurement of temperature and various effects of warming.
And its consequence is "desertification, landdegradation, lack of food security and greenhouse gas flows in terrestrialecosystems", among others.
Due to global warming, polar bears would becomeextinct before 2100. Greenhouse gas emissions cause the progressivedisappearance of their habitat.
Currently, the North Pole is covered by sea icethroughout the year. ... Due to current global warming, the area of theArctic Ocean that is covered by sea ice has shrunk rapidly in recent decades.This substantially affects the Arctic ecosystem and climate.