Renewable energies are essential to a sustainable future. Without the implementation of the most important energy sources, which are wind, solar and geothermal, we a certain to run into an energy crisis.
Fossil fuel use has led to the inadmissible effects such as global warming, climate change, ozone layer depletion and acid rain. Solar energy can help reduce the already irreversible effects of fossil fuel use. Solar energy has been used for thousands of years to provide heat, start fires and dry food for preservation to name a few. In one day, the Sun gives off enough energy to provide us with power for 27 years. There are two main techniques used today to collect solar energy, solar energy and solar cells. Solar collectors are mirror like devices that are curved to focus the suns rays on a specific point to heat water that produces steam and runs a turbine. Solar cells work by converting solar rays into electrical power through photo-electromotive power.
Wind energy is produced by the Sun as well. In fact, all energy that has ever been produced is because of the Sun. The Sun heats up different parts of the planet, thus causing unequal heat distribution. Hot air rises and cold air falls and takes its place. These are called local winds. Capturing this resource is easy and efficient. Turbines are the main way we harness the wind. They are made from three large blades mounted to a shaft on top of a tower, which is connected to a turbine. The blades spin, rotating the shaft, which in turn creates electricity by turning a generator. Wind turbines are easy to maintain and are highly efficient. They would also create jobs in the manufacturing, construction and engineering industries.
Geothermal energy is the heat energy generated by the Earth’s core. Water is heated by the core and creates steam and heat. Geothermal energy has a number of different uses such as domestic hot water supply, dry ice production and of course, electricity...