You don't always have to hold back. If what you want is made from stuff which has been or will be recycled, there's no problem. Some paper is completely recycled. Great! So are more and more other things. Buying food that's organically grown is also fine because food grown that way is nature-friendly. Growing it works with natural cycles and so can be done for ever (as long as the sun shines). It's sustainable. And because the sun does shine, it's more and more easy to use electricity (power) that's generated by renewable methods. That's solar power, wind power, water power.

	Some electricity companies now offer electricity supplies guaranteed to be from renewable sources. And in a few years, many vehicles will run on hydrogen fuel cells which don't create any pollution. The hydrogen could be made using the sun to break down water into its two elements - hydrogen and oxygen atoms (H2O)... totally renewable energy. Or it could be made from fermented crop plants like sugar cane from which you can get methanol (a type of alcohol). The methanol (a molecule made of 1 carbon and 4 hydrogen atoms) can be easily used as a hydrogen source.