First, let me apologize for the extremely short nature of this post.
Since my conservative friends like simple answers to complex questions, here's my simple answer to their claims there's nothing to the charge that man and his pollutants are poisoning and altering our climate. My experience has been it shuts them up each time I've used it.
I tell them...
Park your car in your garage, close the door and leave the engine running, with you in it. Let me know how that works out.
They go speechless. Checkmate. Game over.
Idiots.