Greta Thunberg has released a video showing a family calmly getting ready for the day while their house burns down around them as a symbol of the threat of climate change.
The small patches of fire around the house grow steadily throughout the short film, covering most of the house by the end.
The parents happily waving their children off to school appear to represent the political leaders whom Ms Thunberg and other climate activists have criticised for complacency on the environment.
The video, released for World Earth Day on Wednesday, references Ms Thunberg's statement at the World Economic Forum in Davos last year, when she told delegates: "I want you to act as if our house is on fire. Because it is."
Earth Day 2020 - In pictures
Global carbon dioxide levels appear to have dropped as a result of massively reduced activity worldwide, with many countries having undergone some form of lockdown to slow the spread of coronavirus.
Carbon dioxide emissions temporarily went down by around a quarter in China in the first part of the year, according to climate research group Carbon Brief.
But activists and researchers have warned that the climate movement may lose momentum as attention switches to containing and finding a cure for the virus.
Ms Thunberg released the video with her climate activism group Fridays for Future.
Greta Thunberg - In pictures
Fridays for Future US spokesperson Joe Hobbs said in a statement: 'We believe it's time people realise that climate change isn't going to happen, but that it's already happening.
'We hope that by watching this video people will realise they need to take action now, instead of putting it off until later.
Fridays for Future will launch a 24-hour livestream on Friday to highlight climate action.
