WASHINGTON, DC - SEPTEMBER 18: Founder of Fridays For Future Greta Thunberg testifies during a House Foreign Affairs Committee Europe, Eurasia, Energy and the Environment Subcommittee and House (Select) Climate Crisis Committee joint hearing September 18, 2019 on Capitol Hill in Washington, DC. Thunberg, who recently sailed across the Atlantic Ocean in a zero-carbon emissions sailboat, is in Washington to discuss the climate crisis with lawmakers and will speak at the UN Climate Action Summit on September 23 in New York. (Photo by Alex Wong/Getty Images)
Video Ad Feedback
Greta Thunberg to Congress: Listen to the scientists
00:51 - Source: CNN
Climate Crisis 16 videos
WASHINGTON, DC - SEPTEMBER 18: Founder of Fridays For Future Greta Thunberg testifies during a House Foreign Affairs Committee Europe, Eurasia, Energy and the Environment Subcommittee and House (Select) Climate Crisis Committee joint hearing September 18, 2019 on Capitol Hill in Washington, DC. Thunberg, who recently sailed across the Atlantic Ocean in a zero-carbon emissions sailboat, is in Washington to discuss the climate crisis with lawmakers and will speak at the UN Climate Action Summit on September 23 in New York. (Photo by Alex Wong/Getty Images)
Video Ad Feedback
Greta Thunberg to Congress: Listen to the scientists
00:51
Now playing
- Source: CNN
Video thumbnail Ed Hawkins warming stripes
Video Ad Feedback
Graphic shows all the changes in global temperature since 1850
03:28
Now playing
- Source: CNN
florida blob
Video Ad Feedback
A blob twice the width of the US is heading towards Florida's coast
03:13
Now playing
- Source: CNN
antartica bill weir ac360
Video Ad Feedback
90% of ice around Antarctica has disappeared in less than a decade
02:16
Now playing
- Source: CNN
The Lake Powell Pipeline would supply water to Utah's Sand Hollow Reservoir, pictured here.
Video Ad Feedback
US' fastest-growing metro area is running out of water
04:18
Now playing
- Source: CNN
03 Willow Oil Project
Video Ad Feedback
'They don't live there': Alaska activists take Willow Project protest to White House
01:34
Now playing
- Source: CNN
Coral Seeding 3
Video Ad Feedback
See the technique that could help save the Great Barrier Reef
02:01
Now playing
- Source: CNN
A bird flys above the beach at Lake Mead in Boulder City, Nevada on Sept. 11, 2022.
Video Ad Feedback
As water levels drop at this major lake, bodies begin to appear
03:19
Now playing
- Source: CNN
A bird flys above the beach at Lake Mead in Boulder City, Nevada on Sept. 11, 2022.
Video Ad Feedback
Glacier larger than Florida is rapidly losing ice. What could happen if it collapses?
02:49
Now playing
- Source: CNN
recycling 1
Video Ad Feedback
A lot of your plastic isn't being recycled. CNN found out why
08:02
Now playing
- Source: CNN
Mississippi river drought
Video Ad Feedback
Mississippi River drought will impact your grocery bill. Here's how
03:50
Now playing
- Source: CNN
gina moseley cave geology c2e spc intl_00003308.png
Video Ad Feedback
How the world's northernmost caves could hold answers to climate change
04:08
Now playing
- Source: CNN
The light house along Canal Park, a popular tourist destination, guides ships into the harbor
Video Ad Feedback
This Midwest city is becoming a safe haven for climate refugees
08:11
Now playing
- Source: CNN
Genesis Butler
Video Ad Feedback
The 15-year-old activist on a mission to help the planet
04:00
Now playing
- Source: CNN
marsh climate schools pkg vpx
Video Ad Feedback
See how the climate crisis is having an extreme impact on education in the US
02:57
Now playing
- Source: CNN
mississippi river underwater levee army corps ricky boyett
Video Ad Feedback
Why Army Corps is 'lifting the bottom' of Mississippi River
05:15
Now playing
- Source: CNN
CNN  — 

They flooded streets in Australia, in India, in the United Kingdom, in the United States, united in their call for the adults in charge to do something to address climat