Speaking at a panel at the World Economic Forum in Davos, Switzerland on Wednesday, Britain’s Prince Charles pleaded with world leaders to take immediate action to help combat climate change and save the planet. 

Referring to climate change as one of the greatest threats to humanity, the Duke of Cornwall called on business leaders and politicians to take revolutionary action to create a more sustainable future.

“We are in the midst of a crisis that is now, I hope, well understood,” Charles said. “Global warming, climate change, the devastating loss of biodiversity are the greatest threats that humanity has ever faced and one largely of our own creation.”

The Prince of Wales has spent years advocating for the environment and talking to world leaders about the devastating impacts of climate change. In June, he addressed foreign ministers of the Commonwealth during a reception at Clarence House, where he warned that the next 18 months would be critical in the fight against climate change. 

Offering up some economic solutions of his own on Wednesday, he urged world leaders to end taxpayer subsidies for fossil fuels, instead suggesting the implementation of carbon pricing and an influx of eco-friendly investments.

“What good is all the extra wealth in the world, gained from ‘business as usual,’ if you can do nothing with it except watch it burn in catastrophic conditions?” Charles said at the WEF.

He also called on governments and businesses to detail exactly how they plan to reach net-zero carbon emissions by 2050, a target made under the Paris agreement. 

“Do we want to go down in history as the people who did nothing to bring the world back from the brink in time to restore the balance when we could have done?” Charles said. 

During his speech, the prince introduced the Building Sustainable Markets Initiative, which aims to bring world leaders together decarbonize the economy and create sustainable markets.

Charles told the audience he plans to meet with industry leaders throughout the year to discuss their sectors’ impact on climate change and will attend various global summits, including the 2020 United Nations Climate Change Conference, or COP26, in Glasgow, Scotland this November.

“Everything I have tried to do, and urge, over the past fifty years has been done with our children and grandchildren in mind, because I did not want to be accused by them of doing nothing except prevaricate and deny the problem,” he said. “Now of course, they are accusing us of exactly that.”