A healthy dose of skepticism is always a good idea.
My take is that even if we are only 50% responsible for the warming of the planet we need to take steps right now to change our behaviour.
If the science is right, the Antarctic ice core samples provide fairly compelling evidence. They have samples that are around 800 thousand years old and the gas samples taken show the atmosphere goes through an incredibly stable cycle every 100 thousand years, where the co2 levels rise and fall. Until the 1950s, when the co2 levels break out of cycle. Coincidentally, it's also the decade that humans started driving gas guzzlers en masse and airline industry started taking off.
The sea levels are rising, expanding is probably a more accurate description and if the Antarctic ice sheet starts melting, then it's game over.
Unlike other interested parties, what do climate scientists have to gain by publishing their research?