The document discusses climate change and global warming. It states that carbon dioxide traps heat in the atmosphere, known as the greenhouse effect, and human CO2 emissions are increasing global temperatures. Temperatures in the late 20th century were the hottest in the last 400-1000 years. CO2 levels have risen from 180-280 ppm in the last 100,000 years to 380 ppm currently, and could reach 400 ppm within 10-15 years. This would cause a 2 degree Celsius rise in global temperatures and potentially trigger melting of the Greenland ice cap. The future is predicted to include more heat waves, floods, ice melt, sea level rise and droughts driven by weather changes.