Efficiency is essentially getting the same bang for less buck. You can purchase ENERGY STAR appliances and other electronic devices instead of buying conventional ones which would save electricity lowering your electric bill and CO2 emissions. Surprisingly the average family releases 28,000 pounds of Carbon per year which combines with oxygen creating 100,000 pounds of CO2 per year and this could be drastically lowered by using energy efficient devices. In addition, instead of buying tons of natural gas to heat your water, you can install a solar water heater to assist or replace your gas water heater. The physics be-hing them is very simple, sun hits a panel containing metal pipes which absorb the energy, Since heat travels from hot to cold, the hot pipes transfer their thermal energy to the water, thus heating it. Furthermore, you can install solar-panels on your roof, Surprisingly, if every person in the world had a few square yards of solar panels you could power the world.
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