Climate security

Climate Change: What Do The Scientists Really Say?

...Trenberth: The main source of human-induced climate change is from increasing carbon dioxide and other greenhouse gases in the atmosphere. And we have plenty of evidence that we’re responsible for the over 40 percent increase in carbon dioxide concentrations in the atmosphere since pre-industrial times, and more than half of that has occurred since 1980.

Toon: I think the problem is that carbon dioxide is rising proportional to population on the Earth. If you just plot carbon dioxide in the last few decades versus global population, it tracks almost exactly. In coming decades, we’re increasing global population by a million people a week. That’s a new city in the world of a million people every week somewhere, and the amount of energy that’s already committed to supporting this increasing population is very large.