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?