You could engineer a human to survive the greenhouse effect because you think that's what's going to happen, and then all of a sudden the glaciers are creeping down on you.
For every $1 billion we invest in public transportation, we create 30,000 jobs, save thousands of dollars a year for each commuter, and dramatically cut greenhouse gas emissions.
Greenhouse gas pollution, through its contribution to global climate change, presents a significant threat to Americans' health and to the environment upon which our economy and security depends.
