Harry criticises climate change deniers, saying ‘no one can deny science’

The Duke of Sussex has hit out at climate change deniers in a passionate rallying call in which he warned "no one can deny science".

Harry, in Botswana during his royal tour of Africa, stressed saving the environment was a race against time, adding: "Led by Greta, the world's children are striking."

The duke said he could not understand why anyone – "you, us, children, leaders" could ignore the facts from the last four decades.

US president Donald Trump has repeatedly criticised the idea of climate change.

Teenage Swedish activist Greta Thunberg sparked the global climate strike movement, which saw hundreds of thousands of people, including children who skipped school, take part in the second Global Climate Strike last Friday.

Harry, who was at the Chobe Tree Reserve, said: "This last week, led by Greta, the world's children are striking.

"There's an emergency ... it's a race against time and one which we are losing.

"Everyone knows it.

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Royal visit to Africa
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Royal visit to Africa
The Duke of Sussex makes a speech at a reception at the British High Commissioner�s Residence in Lilongwe, Malawi.
The Duke of Sussex speaks to Angeline Murimirwa, the Executive Director of Africa CAMFED, during his visit to the Nalikule College of Education in Malawi on day seven of the royal tour of Africa.
The Duchess of Sussex appears on a television screen as she speaks via skype during the Duke of Sussex's visit to the Nalikule College of Education in Lilongwe, Malawi, to see the work of the CAMA network supporting young women in Malawi.
The Duke of Sussex arrives at the Nalikule College of Education to learn about the CAMA network and how it is supporting young women in Malawi on day seven of the royal tour of Africa.
The Duke of Sussex sings with the CAMA choir during a visit to the Nalikule College of Education in Lilongwe, Malawi, to see the work of the CAMA network supporting young women in Malawi.
The Duke of Sussex sings with the CAMA choir during a visit to the Nalikule College of Education in Lilongwe, Malawi, to see the work of the CAMA network supporting young women in Malawi.
The Duke of Sussex walks on Princess Diana Street in Huambo, Angola, on day five of the royal tour of Africa. The Duke is visiting the minefield where his late mother, the Princess of Wales, was photographed in 1997, which is now a busy street with schools, shops and houses.
Photo by: KGC-178/STAR MAX/IPx 2019 9/28/19 Meghan, The Duchess of Sussex, ties a ribbon at the memorial to student Uyinene Mrwetyana at the post office where she was raped and murdered last month. A post on the official Instagram account of the Duke and Duchess of Sussex said "The Duke and Duchess had been following what had happened from afar and were both eager to learn more when they arrived in South Africa." These images were posted on @SussexRoyal today and supplied by the Royal Household.
Photo by: KGC-178/STAR MAX/IPx 2019 9/28/19 Meghan, The Duchess of Sussex, ties a ribbon at the memorial to student Uyinene Mrwetyana at the post office where she was raped and murdered last month. A post on the official Instagram account of the Duke and Duchess of Sussex said "The Duke and Duchess had been following what had happened from afar and were both eager to learn more when they arrived in South Africa." These images were posted on @SussexRoyal today and supplied by the Royal Household.
The Duke of Sussex arrives for an audience with President Jo�o Louren�o at the presidential palace in Luanda, Angola on day six of the royal tour of Africa.
The Duke of Sussex in front of the Diana Tree in Huambo, Angola, on day five of the royal tour of Africa. The Duke is visiting the minefield where his late mother, the Princess of Wales, was photographed in 1997, which is now a busy street with schools, shops and houses.
The Duke of Sussex meets with the President of Angola Joao Lourenco and First Lady Ana Dias Lourenco at the presidential palace in Luanda, Angola on day six of the royal tour of Africa.
The Duke of Sussex meets Barnaby Jose Mar, 6, as he visits the Princess Diana Orthopaedic Centre in Huambo, Angola, on day five of the royal tour of Africa.
The Duke of Sussex meets landmine victim Sandra Tigica, who Princess Diana met on her visit to Angola 1997, during a reception at the British Ambassadors Residence in Luanda, Angola, on day five of the royal tour of Africa.
File photo dated 14/01/97 of Diana, Princess of Wales, with Sandra Tigica 13, at the orthopaedic workshop in Neves Mendinha, near Launda, Angola. The Duke of Sussex met Sandra Tigica again today, on day five of the royal tour of Africa.
File photo dated 30/06/97 of Prince Harry standing with Eufrafina, 3 and her mother Sandra Tigica. The Duke of Sussex met Sandra Tigica again on day five of the royal tour of Africa, recalling when Princess Diana met on her visit to Angola in 1997.
The Duke of Sussex meets patients as he visits the Princess Diana Orthopaedic Centre in Huambo, Angola, on day five of the royal tour of Africa.
The Duke of Sussex sits alone beneath the Diana Tree in Huambo, Angola, on day five of the royal tour of Africa. The Duke is visiting the minefield where his late mother, the Princess of Wales, was photographed in 1997, which is now a busy street with schools, shops and houses.
Britain's Prince Harry walks through a minefield in Dirico, Angola Friday Sept. 27, 2019, during a visit to see the work of landmine clearance charity the Halo Trust, on day five of the royal tour of Africa. Prince Harry is following in the footsteps of his late mother, Princess Diana, whose walk through an active mine field in Angola years ago helped to lead to a global ban on the deadly weapons. (Dominic Lipinski/Pool via AP)
Prince Harry retraces Diana's footsteps through Angola minefield
FILE - In this Jan. 15, 1997 file photo, Britain's Princess Diana uses a remote switch to trigger the detonation of some explosive ordinance dug up by mine sweepers in Huambo, Angola. Prince Harry on Friday Sept. 27, 2019, is following in the footsteps of his late mother, Princess Diana, whose walk through an active mine field in Angola years ago helped to lead to a global ban on the deadly weapons. (AP Photo/Giovanni Diffidenti, File)
Britain's Prince Harry watches a controlled explosion in a partially cleared minefield in Dirico, Angola Friday Sept. 27, 2019, during a visit to see the work of landmine clearance charity the Halo Trust, on day five of the royal tour of Africa. Prince Harry is following in the footsteps of his late mother, Princess Diana, whose walk through an active mine field in Angola years ago helped to lead to a global ban on the deadly weapons. (Dominic Lipinski/Pool via AP)
FILE - In this Jan. 15, 1997 file photo, Princess Diana, wearing a bombproof visor, visits a minefield in Huambo, in Angola. Prince Harry on Friday Sept. 27, 2019, is following in the footsteps of his late mother, Princess Diana, whose walk through an active mine field in Angola years ago helped to lead to a global ban on the deadly weapons. (John Stillwell/PA via AP, File)
Britain's Prince Harry walks through a minefield in Dirico, Angola, Friday Sept. 27, 2019, during a visit to see the work of landmine clearance charity the Halo Trust, on day five of the royal tour of Africa. Prince Harry is following in the footsteps of his late mother, Princess Diana, whose walk through an active mine field in Angola years ago helped to lead to a global ban on the deadly weapons. (Dominic Lipinski/Pool via AP)
Britain's Prince Harry walks through a minefield in Dirico, Angola, Friday Sept. 27, 2019, during a visit to see the work of landmine clearance charity the Halo Trust, on day five of the royal tour of Africa. Prince Harry is following in the footsteps of his late mother, Princess Diana, whose walk through an active mine field in Angola years ago helped to lead to a global ban on the deadly weapons. (Dominic Lipinski/Pool via AP)
Britain's Prince Harry walks through a minefield in Dirico, Angola Friday Sept. 27, 2019, during a visit to see the work of landmine clearance charity the Halo Trust, on day five of the royal tour of Africa. Prince Harry is following in the footsteps of his late mother, Princess Diana, whose walk through an active mine field in Angola years ago helped to lead to a global ban on the deadly weapons. (Dominic Lipinski/Pool via AP)
Britain's Prince Harry walks through a minefield in Dirico, Angola Friday Sept. 27, 2019, during a visit to see the work of landmine clearance charity the Halo Trust, on day five of the royal tour of Africa. Prince Harry is following in the footsteps of his late mother, Princess Diana, whose walk through an active mine field in Angola years ago helped to lead to a global ban on the deadly weapons. (Dominic Lipinski/Pool via AP)
Britain's Prince Harry walks through a minefield in Dirico, Angola Friday Sept. 27, 2019, during a visit to see the work of landmine clearance charity the Halo Trust, on day five of the royal tour of Africa. Prince Harry is following in the footsteps of his late mother, Princess Diana, whose walk through an active mine field in Angola years ago helped to lead to a global ban on the deadly weapons. (Dominic Lipinski/Pool via AP)
Prince Harry walks through Angola mine field, echoing Diana
Britain's Prince Harry with Jose Antonio, center, of the Halo Trust and a mine clearance worker walk through a minefield in Dirico, Angola Friday Sept. 27, 2019, during a visit to see the work of landmine clearance charity the Halo Trust, on day five of the royal tour of Africa. Prince Harry is following in the footsteps of his late mother, Princess Diana, whose walk through an active mine field in Angola years ago helped to lead to a global ban on the deadly weapons. (Dominic Lipinski/Pool via AP)
The Duke of Sussex during a tree planting event with local children, at the Chobe National Park, Botswana.
The Duke of Sussex is greeted by Tlotlo Moilwa during a visit to the Kasane Health Post, run by the Sentebale charity, in Kasane, Botswana.
The Duke of Sussex gives a television interview during a tree planting event with local school children, at the Chobe National Park, Botswana.
The Duke of Sussex joins in a confidence building exercise with young people including Tlotlo Moilwa (left), during a visit to the Kasane Health Post, run by the Sentebale charity, in Kasane, Botswana.
The Duke of Sussex (left) during a tree planting event with local school children, at the Chobe Tree Reserve, Botswana.
The Duke of Sussex helps plant a baobab tree during a tree planting event with local children, at the Chobe National Park, Botswana.
The Duke of Sussex joins in a tree planting event with local children, at the Chobe National Park, Botswana.
The Duke of Sussex (centre) helps plant a baobab tree during a tree planting event with local children, at the Chobe National Park, Botswana.
The Duke of Sussex (right) with founder of Elephants Without Borders Dr Mike Chase, are welcomed to a tree planting event by local children, at the Chobe Tree Reserve, Botswana.
The Duke of Sussex with founder of Elephants Without Borders Dr Mike Chase, during a tree planting event with local schoolchildren, at the Chobe Tree Reserve, Botswana.
The Duke of Sussex (second left) joins in a group exercise during a tree planting event with local children, at the Chobe Tree Reserve, Botswana.
The Duke of Sussex joins a Botswana Defence Force anti-poaching patrol, on the Chobe river in Kasane, Botswana, on day four of the royal tour of Africa.
The Duke of Sussex joins a Botswana Defence Force anti-poaching patrol on the Chobe river in Kasane, Botswana, on day four of the royal tour of Africa.
A Botswana Defence Force anti-poaching patrol, on the Chobe river in Kasane, Botswana, on day four of the royal tour of Africa.
The Duke of Sussex joins a Botswana Defence Force anti-poaching patrol on the Chobe river in Kasane, Botswana, on day four of the royal tour of Africa.
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"There's no excuse for not knowing that and the most troubling part of that is that I don't believe that there's anybody in this world that can deny science, undeniable science and facts, science and facts that have been around for the last 30, maybe 40 years and it's only getting stronger and stronger.

"I genuinely, I don't understand how anyone in this world, whoever we are, you, us, children, leaders, whoever it is, no one can deny science, otherwise we live in a very, very troubling world."

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