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CO2 is benign because we exhale it?   So tsunamis are OK...

Bite"Let me address the argument that CO2 is benign because we exhale it. That's about as good an argument as saying a tsunami isn't dangerous because we drink water."— -- Rep. Jay Inslee at a 2011 committee hearing
A cold winter proves the earth isn't warming?

BiteSaying global warming isn't real because last winter was cold and snowy, is like saying that spring's not happening because Friday was cooler than Monday. You have to look at the longer trend.
We're not first.   Pond scum did it 2 billion years ago!

BiteHuman's aren't the first species to alter the atmosphere; that distinction belongs to cyanobacteria, (blue-green algae) which, some two billion years ago, invented photosynthesis. But we are the first species to be in a position to understand what we are doing.
Gravity theory has uncertainties too.  So jump off a cliff?

Bite"Science isn't "yes or no." Science is gradually reducing uncertainty. Consider gravity. We know gravity with a fairly high degree of understanding but there are still little areas of gravity theory that scientists are still arguing about exactly how it works. But just because scientists don't h...
"Climate is always changing... !"

BiteSure, the climate always changes—just like asteroids have always hit the Earth. But does that mean that a big asteroid hitting the Earth today would not have a serious impact on human civilisation, just like the one that wiped out the dinosaurs, 65m years ago?
Consensus?  97+% of climate researchers support IPCC

Bite"...97–98% of the climate researchers most actively publishing in the field support the tenets of ACC [anthropogenic climate change] outlined by the Intergovernmental Panel on Climate Change..." —Anderegg, Prall, Harold, & Schneider (PNAS, 2010).
Coral:   Don't worry; it's not cancer (it's coronary thrombosis)

BiteTelling the inhabitants of a coral that island that they're safe because sea level won't rise, is like a doctor telling a smoker, "stop worrying, you aren't going to die of lung cancer", while knowing full well that they're doomed to die from a coronary thrombosis. Ocean acidification (OA) and b...