Welcome to CGD

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Quick view: responses to frequently asked questions on climate

How do we know human activities are contributing to global warming?

Could global warming be beneficial?

What is "abrupt climate change?"

What are the shortcomings of climate models?

Are we committed to future climate change?

What has caused global temperatures to vary naturally by 5 to 7 degrees thousands of years ago before humankind started burning fossil fuels and releasing large amounts of carbon dioxide and other greenhouse gases?

Are regional temperature changes due to human activities?

What about the urban heat island effect?