Refurbished. Refurbished phones are used phones that have been inspected, tested, and restored to full working condition at a factory or authorized service center. They may feature new housings or other new parts, or they may simply be used phones that have been tested and certified.ome âº Glossary âº. Refurbished phones are used phones that have been inspected, tested, and restored to full working condition at a factory or authorized service center.
Renewable energy is generally defined as energy that comes from resources which are naturally replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat.enewable energy flows involve natural phenomena such as sunlight, wind, tides, plant growth, and geothermal heat, as the International Energy Agency explains: Renewable energy is derived from natural processes that are replenished constantly.
Renewable energy allows you to tap into natural resources that are replenished as part of the normal life cycle. Cut a tree down to burn for heat, and that tree is gone forever. Tap into the wind with a turbine to generate electricity, and the wind continues to blow. The Union of Concerned Scientists suggests the following clean renewable energy sources: Wind Power. The U.S. can produce more than 10 times its energy needs through wind power, one of the fastest-growing energy sources. Turbines use wind to generate electricity without creating pollutants. Currently, this is one of the least expensive alternative fuel sources available.