Don't litter. This earth is not your trash bin. Don't pollute if you don't have to and use energy in a smart way. God made the earth. If you disrespect the earth you disrespect God. We are stewards whose dominion is limited. Freedom is not license.
That being said:
Less than half of all published scientists believe global warming is man made.
This comes from the Senate Committee on Public Works. Overall scientific opinion proves NOTHING however in science. This holds as much weight in my eyes as reports saying "there is an overall consensus it is true." Poppycock. Its either true or its not.