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I think any thinking person should be worried about climate change.

I think we should all be more concerned about the environment and the effects of global warming. It will be pointless to talk about all the issues that divide us when it's 300 degrees outside.

One thing we do know about the threat of climate change is that the cost of adjustment only grows the longer it's left unaddressed.

I worry about the world.

You always have to be worried about something that is considered a so-called 'scientific theory' that fits every scenario. Climate change, as they've defined it, can never be disproved.

If we think of what's up ahead, with climate change and wars over water, it's very frightening.

Scientists have been warning about global warming for decades. It's too late to stop it now, but we can lessen its severity and impacts.

Worry is a useless mulling over of things we cannot change.

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