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Climate change is real.

Climate change is very real.

The effects of climate change are real and must be acted on.

We have to face the reality of climate change. It is arguably the biggest threat we are facing today.

It should simply be an empirical matter whether the climate is changing or not and whether we're responsible. But the various sides of the debate have now become so tribal that it's no longer a matter of changing our views as more information comes in.

Climate change is a really abstract thing in most of the world.

Climate change is having a dramatic effect on the ground.

Global warming is real - it is man-made and it is an important problem. But it is not the end of the world.

Climate change is real. Climate change is being substantially increased by humans and the carbon we put into the atmosphere. And it appears to be speeding up. If science has made any mistakes, science has been underestimating it.

Most reputable scientists agree that climate change is real and that the effects are likely to be bad. But nobody can say for sure exactly what 'bad' means. The safest and most equitable way out of this horrific mess is simple: cut fossil-fuel emissions.