More than half of the world's electricity is produced by burning coal, oil and gas. This releases millions of tonnes of carbon dioxide (CO2), the main gas responsible for climate change every year.
But there is an alternative, environmentally-friendly way to generate power: green energy.
'Green energy' or 'green electricity' is generated by transforming the natural energy flows of the Earth such as the sun, water, wind and biomass.
These are usually known as renewable energy sources, because they will never run out. Technologies which result in a more efficient use of energy sources, such as cogeneration, are also considered green as they contribute to reduce climate polluting emissions.
Already a growing number of people are signing up to green electricity tariffs with their power supplier.
WWF calls on businesses and governmental bodies to take the lead on this trend by making voluntary commitments to ensure their energy needs are met by renewable energies.
By doing so, businesses can demonstrate to their customers and stakeholders they are serious about the environment, whilst public bodies can show consistency within their own governmental climate protection goals.