While there are many actors who publicly promote social causes and reveal their deeds out in the open, there are some like Bollywood superstar Akshay Kumar who believe in contributing silently.

The actor who is already a part of many social causes, recently produced a documentary on the effects of global warming. And even before the film came to the media's attention here, it has already made ripples at an international level.

The film titled 'White Knight' is about a commoner 'Chewang Norphel' from Leh who makes artificial glaciers to conserve water for those living in high altitude areas.

Akshay came across his contribution last year and immediately decided to take his initiative to the world.

"Due to global warming, natural glaciers melt faster. As a result, people living in high altitudes face acute water crisis till new glaciers are formed. That's when Chewang started conserving water to make artificial glaciers for them. He's the only man in the world to create artificial glaciers. Making a documentary on the issue may not solve the problem, but it certainly brings focus and groundwork on the subject and becomes the basis for further action," said Akshay.

Directed by Aarti Shrivastava, the documentary has been screened at the South Asian International Film Festival in Canada and the Indian Film Festival in Houston already.