Very true. Most people don't even think of it but if they are made aware of some option they do like to choose a better and more sensible option.

Today I was talking to a restaurateur who is constructing a vegan restaurant and I asked him to include a bio-gas plant for its kitchen waste in its building. He immediately liked the idea and was keen to discuss this with his partner. Now it's decided that they are going for a bio-gas plant for disposing their kitchen waste.