Two thirds of electricity generated in the UK is produced by burning coal and gas in power stations, releasing millions of tonnes of CO2?

The other third of electricity mainly comes from nuclear power, which has other worryingly severe environmental impacts.

‘Green electricity’ refers to supplies from sources that do not cause these impacts upon the environment. Of course, every type of electricity generation will have some impact, but some are much greener than others.

The cleanest energy sources are those that utilise the natural energy flows of the Earth. These are usually known as renewable energy, because they will never run out.

There are a number of the renewable energy technologies that you can successfully apply on a small scale in your home. Coupled with energy efficiency measures, they are an excellent way to contribute towards cutting emissions that lead to climate change. Generous grants are available. See www.lowcarbonbuildings.org.uk and www.energysavingtrust.org.uk/generate_your_own_energy.

• Generate your own renewable energy by installing a solar hot water system which can generate 60% of your hot water.

• Consider a wood heating system; although it releases carbon dioxide wood has already absorbed the exact same amount whilst growing, and buying local fuel brings fuel security and supports the local economy.

• Efficient wood fuelled room heaters and boilers that use logs, wood chips or pellets are increasingly available in the UK.

• Ground source heat pumps can be used to a heat a house efficiently by drawing heat from the ground and are particularly appropriate for new builds.

• Photovoltaics or PV for short, is the name given to systems that produce electricity directly from daylight, to supplement the electricity requirements of your home.

• Small roof mounted wind turbines are becoming available, that can supplement your electricity requirements.

The Energy Efficiency Advice Centre is a good place to get free, impartial advice on energy saving measures that can reduce your bills and help the environment.

Get advice on heating, insulation, renewable energy systems and grants that you may be able to take advantage of. Call free on 0800 512 012.