EWAN is getting on his bike to help save the planet.

The 39-year-old star – who circled the globe on a motorcycle – is swapping horsepower for pedal power.

Ewan has become an ardent cyclist – and even builds his own.

Ewan, who now lives in Los Angeles, said he tried to “think green” when going out – even if it means cycling to the shops.

Ewan, who taught his three daughters, to ride, said: “I am on a bicycle more and more.

“I think urban cycling is becoming super cool and I have actually built a couple of bicycles. I love riding them.”

While filming his new film, The Last Word, in Glasgow he bought two customised track bikes, with frames which cost £1000 each.

But Ewan, who owns 10 vintage motorcycles, has not abandoned his first love.

My star, who has also ridden from John O’Groats to the southernmost tip of Africa, added: “I do like to ride old motorcycles, which aren’t green, but they are still on the road.

” I believe in recycling them, not just getting a new car all the time.

“They are really lovely and I only ride one at a time, not very far. But I get on my bicycle whenever I can now" . Ewan who is a UNICEF ambassador, even has his own eco- tips.

The children’s charity has been running its own water and sanitation campaign.

He said: “Water is our main issue and I am always teaching my kids, getting onto my kids, to turn the taps off when brushing their teeth.

“And when you soap yourself in the shower you switch the tap off. “Soap and then rinse – it’s not a big deal and it makes you feel good about yourself.”