Watch some celebrities show you how they walk. It actually matters.

In September, over a million people all over the world walked for climate change action. Pretty cool show of support, right?

But now it’s time for every single one of us to walk the walk.

Here are some famous people doing it to get you started:

Desmond Tutu

“Join and walk the walk.”

Mark Ruffalo

“I walk the walk because I believe 100% in global energy for 100% of the people.”

Russell Brand

“Why don’t we, the people, join the 2,000 worldwide climate change march and walk the walk?”

And lots of others!