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The problem with climate change is that it's quite complicated for the ordinary person to understand.

In reality, climate change is actually the biggest thing that's going on every single day.

Global climate change has a profound impact on the survival and development of mankind. It is a major challenge facing all countries.

Climate change - for so long an abstract concern for an academic few - is no longer so abstract. Even the Bush administration's Climate Change Science Programme reports 'clear evidence of human influences on the climate system.'

I think the climate has been changing for billions of years.

Climate change has been going on as long as the planet is here, and there will always be a little bit of it.

The bottom line is clear: Climate change is a reality, and it is having a real impact.