This unit focuses on the problem of green-house gas emissions, especially carbon dioxide, and explores what you can do to lighten those emissions to help reduce the rate of climate change. This study unit is just one of many that can be found on LearningSpace, part of OpenLearn, a collection of open educational resources from The Open University. Published in ePub 2.0.1 format, some feature such as audio, video and linked PDF are not supported by all ePub readers.