He is a natural on TV, and more than 80,000 people applied for just 300 tickets for an early screening of David Attenborough's new documentary in Bristol on Oct 23.

Called Seven Worlds, One Planet, it comes at a time when young people, such as Swedish activist Greta Thunberg, are clamouring for greater resolve among world leaders to tackle climate change.

Speaking to the BBC, Attenborough, 93, said he is happy that his work has inspired others.

"It's very odd," he said of his experience on stage at the recent Glastonbury Festival in Britain, where he asked music fans to look after all creatures great and small.

"But the fact remains I've been at it for 60 years."

His new series examines the human impact on climate, animals and the environment in all seven continents. It premieres at 9pm on Nov 4 on BBC Earth (StarHub TV channel 407).

"All these seven worlds are actually one and we are dependent on it for every mouthful of food we eat and every breath of air we take," he said.

"We have it in our hands and we've made a tragic, desperate mess of it so far," added Attenborough who revealed that he was perceived as a "crank" when he expressed such thoughts in his early broadcasting days.

He is not asking for people to completely alter their lifestyles.

"Live the way you want to live but just don't waste.

"Look after the natural world and the animals in it and the plants in it too, this is their planet as well as ours."

In Singapore, Seven Worlds, One Planet will be launched at Supertree Grove at Gardens by the Bay on Nov 2 at 7.30pm. The event is free for the public to attend.

StarHub BBC Earth subscribers can win passes to an exclusive zone in a contest which ends on Oct 24. For more information, visit www.starhub.com/bbc-earth.