Really, the only argument I ever give is that according to reason, correlation does not imply causation. I really think this is the only argument needed. Just because the temperature went up doesn't mean that Co2 was the cause of the rise in temperature, considering that the temperature fluxuates naturally.

Keep in mind, however, that this doesn't mean that global warming pollution theory is false, it just means that it really isn't proven true, and we really don't know if we're seriously affecting the environment or not.

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Oh well she bore all her parts but she never was found
You think "I'll carve a path through New York and be an artist", but are you anything?
Then you find out you can't ask a baby to cry
And an obsession with the past is like a dead fly
And just a few things are related to the old times
Then we did believe in magic and we didn't die
It's not my words that you should follow it's your insides
You're just an inside
Adjust your insides
You're just an inside