Most of the power stations use fossil fuels like coal and oil to generate electricity. In this process, huge quantity of greenhouse gases emitted that are causing the Earth’s atmosphere to warm. This global warming is offering adverse impact on the environment, thus disturbing the ecological balance. The climate change cause more extreme weather, the spread of diseases and threaten the habitat of all living things. The clean energy or the Renewable Energy is considered as the step towards sustainability when earth is pressing hard to capping global warming at 1.5 degrees Celsius.
What is Renewable Energy?
There are many types of renewable energy resources like wind and solar energy which are constantly replenished and will never run out. These energy resources include sunlight, wind, rain, tides, waves, and geothermal heat, and don’t contribute as much to global warming as in case of fossil fuel. Hence, the energy obtained out of such resources is termed as Clean Energy.
Solar Energy – This energy is directly obtained from the sun and can be collected and converted in a few different ways. To convert sun’s energy to usable form, solar panels are required. These use N-type and P-type semiconductor material. When semi-conductor material absorbs sunlight, the solar energy knocks electrons loose from their atoms, allowing the electrons to flow through the material to produce electricity. The whole process is known as photovoltaic effect.
Wind Energy – A wind turbine can use the wind’s energy to generate electricity. These turbines have a mechanical structure that contains two or three blades are mounted on a shaft to form a rotor. A pocket of low-pressure air forms on the downwind side of the blade when the wind blows. This causes the rotor to turn. The rotor spin like a propeller turning shaft spins a generator to make electricity.
There are other types of renewable energy like Geothermal Energy, Bioenergy, Hydropower, Ocean Energy, etc. These types will help in generating environmentally friendly energy. Several countries are stressing hard to move to renewable energy in a bid to control climate change. Iceland gets 85% of the country’s electricity from earth’s heat. Norway uses hydroelectric, geothermal and wind to generate around 98% renewable energy. Scotland is hoping to become 100% renewable by 2020.
Apart from environmental advantages, there are several other advantages associated with clean energy. Recently published report has claimed that renewable energy will be cheaper than fossil fuels. Experts predict that technological improvements will led to a rapid fall in the cost of renewable energy in the upcoming years. Reports are suggesting that renewable power generation technologies are expected to fall within the fossil fuel-fired cost range. So, it time for the global community to put some sincere efforts in moving towards clean energy. Not only will it help in checking global warming but can also prove cost effective.