 Wind farms bring about a reduction in greenhouse gas emissions by displacing electricity that would otherwise come from burning fossil fuels such as coal.Farm methane digesters (or "Farm Power").TerraPass funds emissions reductions from digesters that collect the methane from animal manure on dairy farms and burn it, often generating renewable energy (the heat energy from burning methane can be used to generate electricity; the manure, as the source of methane, is the 'renewable') in the process.