We all know that smoking is bad for us. But how many of us know how bad it is for the planet?

From the moment its seeds go into the ground to the moment its dried and shredded leaves are set alight by the world's 1.1 billion smokers, tobacco leaves a trail of untold destruction. Researchers from Imperial College London found that the industry's annual carbon footprint is almost twice that of Wales.

"If we continue to grow tobacco crops to meet the demand, we'll have huge environmental degradation," Vinayak Prasad, [...]