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FAQ

Is it too late to prevent climate change?
What’s the difference between weather and climate?
Do scientists agree on climate change?
Is the Sun causing global warming?
What is the greenhouse effect?
Why does the temperature record shown on your "Vital Signs" page begin at 1880?
Is the ozone hole causing climate change?
What’s NASA got to do with climate change?
How do we know what greenhouse gas and temperature levels were in the distant past?
What’s the difference between climate change and global warming?
If all of Earth's ice melts and flows into the ocean, what would happen to the planet's rotation?
How do I cite your website?
Which is a bigger methane source: cow belching or cow flatulence?
May I use content and imagery from your website? If so, to whom do I credit them?
How do scientists know their data-processing techniques are reliable?
Once the mistakes are eliminated, are the data ready to use?
How do scientists deal with these changes?
Does data processing destroy the original data?
Can scientists use the data as is?
Does data processing make temperature data warmer?
Where do the data come from?
What kinds of data do scientists use to study climate?
What do volcanoes have to do with climate change?
Has Earth continued to warm since 1998?
Can you explain the urban heat island effect?
Are the land-based ice sheets in Greenland and Antarctica continuing to lose mass (ice)?
What happens if the next solar cycle becomes less active? Will we go into a new ice age?
How are Earth’s mountain glaciers faring in a warming world?
Which measurement is more accurate: taking Earth’s surface temperature from the ground or from space?
How is Earth’s sea ice faring in our warming world?
Is the ocean continuing to warm?

Explore

Interactives, galleries and apps

Images of Change

Images of Change

Explore a stunning gallery of before-and-after images of Earth from land and space that reveal our home planet in a state of flux.
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Climate Mobile Apps

Climate Mobile Apps

Keep track of Earth's vital signs, see the planet in a state of flux and slow the pace of global warming with NASA's free mobile apps.
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Climate Time Machine

Climate Time Machine

Travel through Earth's recent climate history and see how increasing carbon dioxide, global temperature and sea ice have changed over time.
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Eyes on the Earth

Eyes on the Earth

Track Earth's vital signs from space and fly along with NASA's Earth-observing satellites in an interactive 3D visualization.
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Global Ice Viewer

Global Ice Viewer

Earth's ice cover is shrinking. See how climate change has affected glaciers, sea ice, and continental ice sheets.
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