No doubt their are. There's also those who have a vested interest in continuing to pollute. Frankly all the vested interested has made the whole issue a mine field of mis-information. At the end of the day though I look at it like many people look at religion, better to believe now and do what you can to save the environment then get to the end and realize you're too late.

"We submit to the majority because we have to. But we are not compelled to call our attitude of subjection a posture of respect." Ambrose Bierce