Teenage climate activist Greta Thunberg has demanded what she called the "war against nature" ends.
The 16-year-old made the comments in a visit to a German forest, at the centre of an ongoing dispute over fears it is at risk of being destroyed for a nearby mine.
She met with environmental protesters at the site on Saturday and demanded that "our war against nature must end today".
Hambach Forest in western Germany sits next to a massive open-cast lignite pit operated by utility giant RWE.
An expert proposal to end the use of coal in Germany by 2038, approved by the nation's government, was meant to save the forest.
However, activists say RWE is endangering what is left of the woods by pumping out precious groundwater.
Miss Thunberg, 16, said seeing the mine disturbed her deeply.
The teen's school strike for climate protest movement has mobilised tens of thousands of students across Europe each week calling on leaders to do more to tackle global warming.
In March, Miss Thunberg dedicated an award she received from German media to "those protecting the Hambach Forest and the climate activists who fight to keep the fossil fuels in the ground everywhere".
But it is not just the removal of fossil fuels that is damaging Germany's famed forests, as a second consecutive year of unusually dry and warm weather has left swaths of dead and dying trees in forests across Germany.
Officials say droughts, wildfires and hungry beetles destroyed 270,000 acres of forest in Germany in 2018, and the damage this year could be even worse.
The sight of bare trees has stoked debate about the impact of climate change and what measures Germany should be taking to adapt to and prevent global warming.
A poll released on Friday by public broadcaster ZDF found 62% of German voters say it is the most pressing problem, higher than any other issue.
German Chancellor Angela Merkel has acknowledged feeling the pressure coming from Miss Thunberg and her mostly young supporters.
But she has cautioned that "we are also taking new directions, and these new directions must of course be thought through".
Additional reporting by agencies.
