How do you propose enforcing that? Telling society 'use less' doesn't work, just like saying 'smoking kills, stop it' doesn't work: you have to either enforce some policy like tax hikes or graphic images on packs, or introduce a new technology like vaping or nicotine patches.

There's a huge boom of solar at the moment not because people give a shit about the environment, but because the technology has made it a viable alternative, and tax incentives have reduced the barrier to entry.