Sacha Dench, who was attempting a first world tour of mainland Britain to raise awareness about climate change, was seriously injured and Dan Burton, a member of his support staff, was killed after a paramotor crash in the west of the Highlands of Scotland during their challenge.
Ms Dench had attempted to make the 3,000-mile trip to mark the United Nations Cop26 climate change conference.
In a statement, directors of Conservation Without Borders said the accident occurred in the west Highlands of Scotland, near Loch Na Gainmhich.
The statement read: “We are sorry to have to confirm that Dan Burton, the support paramotor, died as a result of the accident. Sacha Dench is seriously injured and is treated in hospital. His injuries are serious but do not endanger his life
“Both very experienced paramotors, our hearts go out to the family of Dan Burton, to whom we offer our deepest condolences.
“The incident was attended by police and medics and investigations are underway to establish the details of the accident.”
Police also released a statement saying there had been a mid-air collision.
A spokeswoman said: ‘Scottish police can confirm that a 54-year-old man has died and a woman was seriously injured following a collision involving two paramotors.
“The police were informed of the incident near the A894 shortly before 4:45 pm and investigations to establish all the circumstances are underway. The closest relatives of those involved have been informed. “
Ms Dench started her journey from Glasgow in June.
The Australian lost her family home to the country’s bushfires last year and has since focused on the campaign against climate change.
Previously asked about why she decided to take to the skies in an electric paramotor, she said: “I am doing this to try to show how far we can go in terms of decarbonizing our transport and our way of life. in general.”
She went on to say: “I think it can show us that if Britain led the Industrial Revolution, we can also lead the Green Revolution.”