Climate experts discuss the science and politics shaping the climate change debate.

There is consensus among nations that climate change is a serious problem. Some 97 percent of the scientific community agrees that it’s real, it’s caused by human activities, and if business continues as usual, it’s going to get a lot worse.

Many are basically using the air as a garbage dump. It’s leading to more droughts and severe weather events. Those who will be impacted most will be the world’s three billion poorest people because they rely on crops and such as income.