British naturalist David Attenborough warned on Tuesday that climate change is the biggest security threat that modern humans have ever faced, telling the U.N. Security Council: "I don't envy you the responsibility that this places on all of you."
U.S. President-elect Joe Biden is planning to cancel the permit for the $9 billion Keystone XL pipeline project as one of his first acts in office, and perhaps as soon as his first day, according to a source familiar with his thinking.
