Electricity from renewable energy sources produces between 90-99% less greenhouse gases (GHGs) compared with coal-fired plants and causes 70-90% less pollution. Focusing on renewable energy sources other than fossil fuels and coals might help in avoiding environmental impacts, specifically from air pollution and GHGs.
When looking at sustainable electricity resources, we commonly identify four: solar, wind, hydro and biomass. Each of them is renewable, but that doesn’t necessarily make them sustainable.
