A small essay I wrote a few years ago:
Not a denier, but I think there's a few things to understand. One, look at the history of this world, it's atmosphere has changed composition many many times through its long history, before we were even a dream in our ancestral DNA.
Two, the amount of change occurring seems to me to vastly over stated. There's change. Sure we caused it, we're a part of this planet, our activities affect the planet. Have to a utter moron to deny that.
Three, on a whole, the big picture, civilization on the whole, is not changing, and its not going to change. We're going to keep building factories and cutting down forests. No matter how loudly you people scream, business will go on.
And most important of all! We are humans, the most adaptable creature this planet has produced so far. We will adapt to the changes around us. Also, there's this talk of 'positive feedback', a cycle has been started that feeds back on itself and grows, we have NO CLUE how to stop it, even if we stopped all emissions this very instant, the feedback loop has already begun. We will simply have to adapt now. Good thing we're the most adaptable species on the earth.
The only debatable point in this whole argument is.. how fast? Stuff is changing, the only part we can even hope to affect is how fast it's changing. Will cutting emissions slow the change? Hell if I know, I don't think anyone can answer that with any certainty. We barely understand the planetary mechanics going on around us. We like to think we do, FFS, we can't even predict the weather a week out. You expect us to predict how emissions are affecting the climate? Wishful thinking, really REALLY wishful arrogant thinking.
Of course, it's utter folly to think we can force a unchanging climate that is perfect for us, all the time, for thousands of years to come. Existence itself is defined by change. The title of a favorite song of mine sticks in my head: The only constant in the universe is change.