View of the devastation caused by a forest fire in the northern area of Brasilia's National Park (PNB), in Brasilia on August 30, 2017.
The PNB extends through 42,000 hectares amid Brasilia's urban area, where no rain has fallen in 100 days and the relative air humidity reaches 10%.

 / AFP PHOTO / EVARISTO SA / EVARISTO SA        (Photo credit should read EVARISTO SA/AFP/Getty Images)
PHOTO: AFP Contributor/AFP/AFP/Getty Images
View of the devastation caused by a forest fire in the northern area of Brasilia's National Park (PNB), in Brasilia on August 30, 2017. The PNB extends through 42,000 hectares amid Brasilia's urban area, where no rain has fallen in 100 days and the relative air humidity reaches 10%. / AFP PHOTO / EVARISTO SA / EVARISTO SA (Photo credit should read EVARISTO SA/AFP/Getty Images)
Now playing
02:35
Fires in Amazon rainforest rage at record rate
Pope Francis meets with Iraq's leading Shiite cleric, Grand Ayatollah Ali al-Sistani in Najaf, Iraq, Saturday, March 6, 2021. The closed-door meeting was expected to touch on issues plaguing Iraq's Christian minority. Al-Sistani is a deeply revered figure in Shiite-majority Iraq and and his opinions on religious matters are sought by Shiites worldwide.
PHOTO: Vatican Media/AP
Pope Francis meets with Iraq's leading Shiite cleric, Grand Ayatollah Ali al-Sistani in Najaf, Iraq, Saturday, March 6, 2021. The closed-door meeting was expected to touch on issues plaguing Iraq's Christian minority. Al-Sistani is a deeply revered figure in Shiite-majority Iraq and and his opinions on religious matters are sought by Shiites worldwide.
Now playing
01:42
Pope Francis holds historic meeting with revered Shia cleric
PHOTO: CNN
Now playing
02:30
Behind the scenes as Pope makes historic trip to Iraq
dr sasa
PHOTO: CNN
dr sasa
Now playing
01:32
Myanmar envoy to UN: It seems like they have a license to kill
meghan markle oprah entrevista harry esposa acusa familia real acoso mentiras inhs lkl max foster_00002717.png
PHOTO: cbs
meghan markle oprah entrevista harry esposa acusa familia real acoso mentiras inhs lkl max foster_00002717.png
Now playing
03:33
CBS releases another teaser for Meghan and Harry's Oprah interview
Now playing
03:49
He feared for his life in Nicaragua. Under Biden's new policy, he's safe in the US
screenshot myanmar funeral on streets
PHOTO: Reuters
screenshot myanmar funeral on streets
Now playing
02:26
Shocking images emerge from Myanmar as military cracks down
Screengrab of Our lady of Salvation Church in Baghdad, Iraq from Ben Wedeman's pkg
PHOTO: CNN
Screengrab of Our lady of Salvation Church in Baghdad, Iraq from Ben Wedeman's pkg
Now playing
03:04
CNN revisits church where massacre occurred ahead of Pope's visit
screengrab Japan oldest woman Olympics torchbearer Kane Tanaka
PHOTO: Source: Kane Tanaka
screengrab Japan oldest woman Olympics torchbearer Kane Tanaka
Now playing
02:43
This 118-year-old woman is set to break Olympic record
Sergey Aleksashenko
PHOTO: CNN
Sergey Aleksashenko
Now playing
01:15
Navalny ally: Of course I'm scared but I cannot hide myself
A split of a Muslim religious leader and the Archbishop of Westminster being interviewed by CNN's Becky Anderson.
PHOTO: CNN
A split of a Muslim religious leader and the Archbishop of Westminster being interviewed by CNN's Becky Anderson.
Now playing
02:14
Pope's Iraq visit is risky. 2 religious leaders explain why it's key
Middle east Iraq Christians pope francis Wedeman pkg intl hnk vpx_00000823.png
Middle east Iraq Christians pope francis Wedeman pkg intl hnk vpx_00000823.png
Now playing
03:44
What's behind the mass exodus of Christians from Iraq?
Screengrab for Paula Hancocks live segment on Myanmar
PHOTO: Twitter
Screengrab for Paula Hancocks live segment on Myanmar
Now playing
03:13
Video shows dramatic escalation of violence in Myanmar
Now playing
03:24
Author describes what happened when ISIS underestimated women fighters
FILE- In this Nov. 7, 2019 file photo, the International Criminal Court, or ICC, is seen in The Hague, Netherlands. The Prosecutor of the International Criminal Court said Wednesday, March 3, 2021 that she has launched an investigation into alleged crimes in the Palestinian territories. Fatou Bensouda said in a statement the probe will be conducted "independently, impartially and objectively, without fear or favor."(AP Photo/Peter Dejong, File)
PHOTO: Peter Dejong/AP
FILE- In this Nov. 7, 2019 file photo, the International Criminal Court, or ICC, is seen in The Hague, Netherlands. The Prosecutor of the International Criminal Court said Wednesday, March 3, 2021 that she has launched an investigation into alleged crimes in the Palestinian territories. Fatou Bensouda said in a statement the probe will be conducted "independently, impartially and objectively, without fear or favor."(AP Photo/Peter Dejong, File)
Now playing
01:57
ICC to investigate alleged war crimes by Israel and Hamas
Attorney-General Christian Porter speaks during a media conference on March 03, 2021 in Perth, Australia. Attorney-General Christian Porter has publicly confirmed he is the cabinet minister named in a historical rape allegation from 1988 which came to light in the last week and has emphatically denied the allegations.
PHOTO: Paul Kane/Getty Images
Attorney-General Christian Porter speaks during a media conference on March 03, 2021 in Perth, Australia. Attorney-General Christian Porter has publicly confirmed he is the cabinet minister named in a historical rape allegation from 1988 which came to light in the last week and has emphatically denied the allegations.
Now playing
02:25
Australian Attorney General denies historical rape allegation
(CNN) —  

Huge fires have been blazing through the Brazilian rainforest this week, with more than half in the Amazon region. The fires spell disaster for the local environment and ecology – and environmentalists and researchers say the blazes were likely lit by cattle ranchers and loggers.

A growing number of high-profile celebrities are among those speaking out about the potential global catastrophe.

Many are demanding accountability from Brazil’s pro-business President Jair Bolsonaro, who activists say encouraged ranchers, farmers and loggers to exploit and burn the rainforest. But the President has said he’s not responsible for the fires.

That hasn’t impressed celebrities, who have taken to social media to ask the President to do more.

“President Bolsonaro please change your policies and help not only your country but the entire planet,” said American singer Madonna in an Instagram post.

But celebrities are also calling on their fans to take action on the climate crisis.

In an Instagram post, American actor Leonardo DiCaprio urged his followers to donate to front line Amazon groups – and vote for leaders who understand the climate crisis when it came to election time.

On Twitter, many people have tweeted using the hashtag #PrayforAmazonia – including Jenner-Kardashian family matriarch, Kris Jenner.

“This is devastating!!! To human lives, to plants and animals, and to our planet,” she said, above a video showing the size and importance of the rainforest.

Top Portuguese soccer star Cristiano Ronaldo was the among a number of sporting stars to publicize the crisis.

“The Amazon Rainforest produces more than 20% of the world’s oxygen and its been burning for the past 3 weeks. It’s our responsibility to help to save our planet,” he said.

Other celebrities have posted or tweeted about the fires, including US singer and producer Miguel, Queer Eye host Bobby Berk, Cuban-American singer Camila Cabello, and Miley Cyrus’ younger sister Noah Cyrus. “Don’t pray for the Amazon,” said Miguel. “Pray for yourself.”

However, some of the photos being circulated by celebrities and social media users inaccurately depict fires from previous years, or in different parts of the world. One widely-shared photo, which shows a wall of smoke arising from the rainforest, was taken in the Amazon more than 20 years ago.

Brazil’s space research center (INPE) said this week that the number of fires in Brazil are 80% higher than last year. According to Christian Poirier, the program director of non-profit organization Amazon Watch, the destruction this year is “unprecedented” compared to previous years.

CNN’s Jessie Yeung contributed to this story.