How much has our global temperature risen since 1880?

What role do the oceans play in the carbon cycle?

Fires release carbon, so measuring the extent and severity of forest fires on Earth helps us understand the carbon cycle

People have been concerned about the rise in CO2 in our atmosphere as the result of human activity, since what time period

CO2 is not the only carbon-containing compound in the atmosphere researchers study. What else do scientists look at?

Which one of these increases the level of carbon dioxide in our atmosphere?

Plants on land have taken in approximately 1/2 of the CO2 that humans have put into the atmosphere over the last decade

No place on Earth is colder today than it was 100 years ago.

Which of the following gases does not trap heat?

As average global temperature rises,

Where have some of the strongest and earliest impacts of global warming occurred?

Compared to other greenhouse gases, carbon dioxide is the most effective at trapping heat near the Earth's surface.

Some kinds of pollution in the atmosphere can act to cool the planet by reducing the amount of solar radiation

If you removed the atmosphere's natural greenhouse effect and everything stayed the same, Earth's temperature would be

How do scientists collect evidence about climate?