Paper manufacturing, envelope conversion and printing require significant quantities of electricity, which is traditionally produced by generators run by fossil fuels: coal, oil or gas. Since the combustion of fossil fuel creates carbon dioxide and other greenhouse gases are contributing to global warming, the urgency of changing to cleaner (emission-free) renewable sources of energy has increased. Renewable and therefore sustainable energy sources available today include wind, solar, hydroelectric, geothermal and ocean tides.
Wind power is the fastest growing energy source in the world. At present, it is the least expensive, most developed and fastest-to-build alternative to fossil fuel. Because wind turbines (aka windmills) use less than 5% of the land where they are sited, they minimize habitat destruction, help preserve open space and allow for multiple uses of the land.
Power generated by wind turbines is fed into the electric grid and replaces electricity generated by fossil fuel.