People have been bowled over by Sir David Attenborough's emotional final plea to help the environment.
The 96-year-old broadcaster has spent his life teaching people about the natural world. In recent years, he has turned his attention to the devastating impact humans and climate change are having on animals and nature.
To mark the end of his most recent BBC documentary series Frozen Planet II, Attenborough delivered an impassioned final plea to audiences, asking them to do something to ensure a future for our planet.
Watch Sir David Attenborough's emotional plea here:During the episode - which aired on BBC One last Sunday (October 16) - viewers were confronted with heartbreaking footage of polar bears and penguins struggling to survive. They were also shown the brutal toll that receding sea ice is taking on wildlife around the world.
At the end of the episode, iconic broadcast Sir David spoke directly to the camera, begging audiences: "If we can do something about it, then do it."
"We can do it. We must do it. Then there will be a future for the planet," he said.
Attenborough's words clearly moved viewers. Many took to Twitter to discuss the episode, calling on policymakers to heed his warning and saying that it should be "compulsory viewing".
"Just wept watching #FrozenPlanet2 - heartbreaking. Should be compulsory viewing for every single politician, leader and policy maker. As Sir David Attenborough said 'We CAN do it. We MUST do it'. For the sake of our beautiful planet, we have to act NOW and all do our bit," one person wrote.
"Watching #FrozenPlanet2 tonight was tough. If David Attenborough can't convince people of the #ClimateEmergency then who can? This should be made compulsory viewing for global policymakers," added another.
"All climate change deniers need to watch tonight’s episode of #FrozenPlanet2 and then try to deny that there’s no climate change - simply frightening stuff," a third commented.
"Jesus, but #FrozenPlanet2 tonight was one of the most extraordinary and powerful pieces of telly I’ve ever seen. These programs are always brilliant, but seeing the effects of climate change so tangibly was a jarring watch. It should be compulsory viewing," a fourth tweeted.