Because he thought that they where a major threat
Please can i have a brainlier
I believe it's A. the others one's seem less likely.
The enormity of global warming can be daunting and dispiriting. What can one person, or even one nation, do on their own to slow and reverse climate change? But just as ecologist Stephen Pacala and physicist Robert Socolow, both at Princeton University, came up with 15 so-called "wedges" for nations to utilize toward this goal—each of which is challenging but feasible and, in some combination, could reduce greenhouse gas emissions to safer levels—there are personal lifestyle changes that you can make too that, in some combination, can help reduce your carbon impact. Not all are right for everybody. Some you may already be doing or absolutely abhor. But implementing just a few of them could make a difference.
Coining money, overriding a presidential veto, and making laws are all congressional powers. Commanding the armed forces belongs to the President of the United States, as he is the Commander in Chief.