The document has been written by David Jenkinson, a Rothamsted senior fellow. It provides a detailed but accessible walk-through of the hows, whats, whys and wheres of climate change. Its chapters cover the following: the science of climate change; the greenhouse gases; how people use energy; using models to forecast future climate; reducing the release of GHGs to the atmosphere; geoengineering as a way of counteracting climate change; energy from biomass; sources of energy that do not depend on carbon; adapting to climate change; economic incentives to reduce emissions.