The end of the world is closer than you think. Even assuming it’s not brought on by a zombie plague or alien invasion, Earth's finite cache of natural resources are drizzling down to the last few drops after a century of wanton gluttony. Sustainability, rather than just fancy cocktail conversation, is now a matter of survival; we need to ration our remaining resources for long enough to invent other solutions. Adopting a more sustainable lifestyle, through energy conservation and local sufficiency, is not necessarily a solution in itself, but it will help buy time against civilization's looming collapse. If the apocalypse happened tomorrow, could you survive? Could you produce your own food, shelter, water and energy? Now's a good time to start thinking about it.