Is it climate change or global warming? How a secret memo shaped the answer

Is it climate change or global warming? How a secret memo shaped the answer
When President Donald Trump uses the term "global warming," or "Global Waming" as he Tweeted in January, he typically uses it to make fun of it. But which term is it, "global warming" or "climate change"? Why there are different terms to describe one phenomenon is an interesting tale marked by political intrigue, secret memos and even a few dirty tricks and the answer to "which is it," may surprise you.