The air changed fast
Earth’s atmosphere now holds about 50% more carbon dioxide than before the Industrial Revolution. Those levels are not seen for millions of years.Climate Change: How We Know Humans Are Heating Earth
That extra gas acts like a heat trap
Sunlight passes in and warms Earth’s surface. The ground then gives off heat, and greenhouse gases absorb part of it, slowing its escape and warming the lower atmosphere.Climate Change: How We Know Humans Are Heating Earth
