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Indianapolis, Indiana, USA skyline on the Canal Walk.

Memorial Day weekend 2019: 10 best places to go in the US

Youth climate activists protest at a weekly Fridays for Future demonstration ahead the Europe elections on May 24, 2019 in Cologne, western Germany. (Photo by INA FASSBENDER / AFP) (Photo credit should read INA FASSBENDER/AFP/Getty Images)

Global Climate Strike: Record number of students walk out

Schoolchildren take part in a student climate protest on March 15, 2019 in London, England. Thousands of pupils from schools, colleges and universities across the UK will walk out today in the second major strike against climate change this year. Young people nationwide are calling on the Government to declare a climate emergency and take action. Similar strikes are taking place around the world today including in Japan and Australia, inspired by 16-year-old Greta Thunberg who criticised world leaders at a United Nations climate conference.

We have less time than you think to jump-start climate action

INDIA - MARCH 03: Bengal tiger (Panthera tigris tigris), Felidae, Jim Corbett National Park, Uttarakhand, India. (Photo by DeAgostini/Getty Images)

A wildlife filmmaker's guide to India's Jim Corbett National Park

india jim corbett national park vision_00012711.jpg

Exploring India's Jim Corbett National Park

The presidential helicopter Marine One is seen flying along with Osprey planes over the areas destroyed by Hurricane Michael, in Mexico Beach, on October 15, 2018. - HECTOR RETAMAL/AFP/Getty Images

2018 Atlantic Hurricane Season Fast Facts

Join a rideshare to the Great Barrier Reef with scUber

High noon weekend view of Kailua Beach located on the eastern side of the Oahu Island, Hawaii. This beautiful beach has unusual tranquil water which makes it popular for safe swimming, windsurfing,boating and ocean kayaking.

10 best US beaches for 2019

Uber offers rides to the Great Barrier Reef

John Delaney releases $4 trillion climate plan that aims to tax carbon, return funds to American people

KENYA - 2018/08/19: An endangered black rhinoceros or hook-lipped rhinoceros (Diceros bicornis) female and baby at the Lewa Wildlife Conservancy in Kenya. (Photo by Wolfgang Kaehler/LightRocket via Getty Images)

Humans causing shrinking of wildlife as larger animals die off

High noon weekend view of Kailua Beach located on the eastern side of the Oahu Island, Hawaii. This beautiful beach has unusual tranquil water which makes it popular for safe swimming, windsurfing,boating and ocean kayaking.

Top US beaches for 2019

The best things to do on Whidbey Island

The Chagos Islands look like paradise but have a dark history.

UK suffers major UN defeat over Chagos Islands decolonization

EPA Administrator Lisa P. Jackson speaks during a news conference on greenhouse gases at the Environmental Protection Agency headquarters on December 7, 2009

7 former EPA administrators offer to help Congress with agency oversight

Erna Hankic, the vice president of the SEIU Local 6 Union, leads chants in protest of AmazonÕs security contractor, Security Industry Specialists (SIS) outside the annual Amazon shareholders meeting on Wednesday, May 22, 2019, at Fremont Studios in Seattle, Wash. (Jovelle Tamayo for CNN)

Amazon weathers contentious shareholder meeting, as investors and workers press for change

Washington becomes the first state to legalize composting of humans

How human composting works

A Port Arthur, Texas LNG export project that's under development is seen in this artist's rendering

Saudi Arabia wants to buy tons of American natural gas

IN SPACE - JULY 17: (EDITORIAL USE ONLY) In this handout photo provided by the European Space Agency (ESA) on July 17, 2014, German ESA astronaut Alexander Gerst took this image of the Earth reflecting light from the sun whilst aboard the International Space Station (ISS). Gerst returned to earth on November 10, 2014 after spending six months on the International Space Station completing an extensive scientific programme, known as the 'Blue Dot' mission (after astronomer Carl Sagan's description of Earth, as seen on a photograph taken by the Voyager probe from six billion kilometres away). (Photo by Alexander Gerst / ESA via Getty Images)

Spike in banned ozone-eating CFC gases linked to China in new research

African Buffalo, Taken at Mana Pools National park, Zimbabwe, Africa.

Zimbabwe lifts ban on buffalo bow hunting to boost tourism

UPS is turning trash into gas to clean up its emissions

DENALI NATIONAL PARK, AK - SEPTEMBER 1: A view of Denali, formerly known as Mt. McKinley, on September 1, 2015 in Denali National Park, Alaska. According to the National Park Service, the summit elevation of Denali is 20,320 feet and is the highest mountain peak in North America. (Photo by Lance King/Getty Images)

25 of the most beautiful places around the world

This aerial picture taken on October 15, 2018 shows Normandy American Cemetery close to Omaha beach in Colleville-sur-Mer, on the French western Norman coast. (Photo by DAMIEN MEYER / AFP) (Photo credit should read DAMIEN MEYER/AFP/Getty Images)

CNN Travel's 19 best places to visit in 2019

5 things to know for May 22: Washington, Brexit, tornadoes, Dallas slayings, climate

The calf continues to surpass milestones, Lincoln Park Zoo said on Twitter.

Rare eastern black rhinoceros is born at Chicago's Lincoln Park Zoo

Majority of sunscreens could flunk proposed FDA standards for safety and efficacy, report to say

East Lorengau Refugee Transit Center on Manus Island, Papua New Guinea.

Refugees attempted suicide after Australia's election, activists say

FILE - In this Oct. 31, 2018, file photo, demonstrators hold images of Amazon CEO Jeff Bezos near their faces during a Halloween-themed protest at Amazon headquarters over the company's facial recognition system, "Rekognition," in Seattle. San Francisco is on track to become the first U.S. city to ban the use of facial recognition by police and other city agencies as the technology creeps increasingly into daily life. Studies have shown error rates in facial-analysis systems built by Amazon, IBM and Microsoft were far higher for darker-skinned women than lighter-skinned men. (AP Photo/Elaine Thompson, File)

For the first time, Amazon faces an enormous slate of shareholder proposals

Reusable packages are coming to Walgreens and Kroger

Dunham Massey Park, Altrincham, United Kingdom, December 2014.

Return a quarter of UK to nature to fight climate change, say environmentalists

BP is under pressure over climate change.

BP resists calls to match Shell's climate change goals

Tidewater glacier in Southeast Greenland, summer of 2018

Global sea levels could rise 2 meters by 2100, study finds

GREENLAND - MARCH 30: Sea ice is seen from NASA's Operation IceBridge research aircraft off the northwest coast on March 30, 2017 above Greenland. NASA's Operation IceBridge has been studying how polar ice has evolved over the past nine years and is currently flying a set of eight-hour research flights over ice sheets and the Arctic Ocean to monitor Arctic ice loss aboard a retrofitted 1966 Lockheed P-3 aircraft. According to NASA scientists and the National Snow and Ice Data Center (NSIDC), sea ice in the Arctic appears to have reached its lowest maximum wintertime extent ever recorded on March 7.Scientists have said the Arctic has been one of the regions hardest hit by climate change. (Photo by Mario Tama/Getty Images)

Sea levels may rise much faster than previously predicted, swamping coastal cities such as Shanghai, study finds

TOPSHOT - A man rides his bicycle through a damaged road in Toa Alta, west of San Juan, Puerto Rico, on September 24, 2017 following the passage of Hurricane Maria.
Authorities in Puerto Rico rushed on September 23, 2017 to evacuate people living downriver from a dam said to be in danger of collapsing because of flooding from Hurricane Maria. / AFP PHOTO / Ricardo ARDUENGO (Photo credit should read RICARDO ARDUENGO/AFP/Getty Images)

Grenada PM: Climate change is an existential threat for us in the islands

Exterior view of the US Capitol building, Washington DC, January 18, 2017. (Photo by Mark Reinstein/Corbis via Getty Images)

The Democratic Party is being transformed. These House votes show how.

A legacy of lunacy haunts Kenya's old railway. Will China's $3.6B line be different?

A plume of exhaust extends from the Mitchell Power Station, a coal-fired power plant located 20 miles southwest of Pittsburgh, on September 24, 2013 in New Eagle, Pennsylvania.

New York Times: New EPA technique could limit estimated deaths counted from air pollution

This image of Pluto was captured from New Horizons was captured on Monday, July 13, about 16 hours before the moment of closest approach. The spacecraft was 476,000 miles from the surface of the dwarf planet.

What keeps Pluto's ocean from freezing?

Prince Charles agrees to meet Trump during controversial state visit

US kids aren't eating enough seafood, study says; here's how to add more

Michael Bennet links conservation with global warming in new climate plan

Antigua: Central America's most charming city

What to see when you go to Antigua, Guatemala

In this photo taken on January 10, 2019 an olive ridley sea turtle lays dead with a rope around its neck on Marari Beach near Mararikulum in southern India's Kerala state. - Getting tangled in nets and ropes used in the fishing industry are a frequent hazard for vulnerable olive ridley sea turtles, which hatch by the millions in their largest nesting grounds each year along the coast of Odisha state in southeast India. (Photo by SOREN ANDERSSON / AFP) (Photo credit should read SOREN ANDERSSON/AFP/Getty Images)

Plastic pollution is killing these animals

BERLIN, GERMANY - NOVEMBER 03: Cars and traffic fill the A100 ring highway at dusk on November 3, 2014 in Berlin, Germany. Germany is heatedly debating the introduction of highway tolls (in German: Maut), which in the current form proposed by German Transport Minister Alexander Dobrindt would be levied solely on foreigners. Dobrindt's office argues that this is not discrimination, which would be illegal under European Union law, since Germans already pay an annual car tax. (Photo by Sean Gallup/Getty Images)

Climate change concerns sour Germany's love for cars