BY switching to a green energy provider you will know that the money you are spending is contributing to alternative energy sources. There are many green offerings on the market, each supporting renewable energy in different ways. Here's a quick guide: Green Source is when some or all of the energy supplied is from a renewable source such as wind or hydroelectricity. Green Energy Fund is where a proportion of your money is spent on building more renewable sources or supporting green projects such as raising CO2 awareness in schools. Carbon Offset is when the supplier will offset the CO2 by investing in CO2 reduction projects.