Reduce, reuse - and recycle.
The last of the "three Rs," recycling gives fresh value to the natural resources that are tapped to produce products for consumption. Recycling can benefit the environment by reducing waste - and it's also big business.
Using public transport, recycling and turning off the lights all help us be more environmentally friendly. But do these actions go far enough? As part of DW's #HowGreenAmI series, Louise Osborne tried being vegan for one week to see how green she could really be.