Clean and Renewable Energy
When many countries realize the effect of global warming may endanger future human life and environmental damages, they look at natural and renewable sources as energy alternatives such as water, ocean, wind, sunlight, solar, geothermal, biofuel and biomass which are quickly replenished and clean. Most of energy is derived from the sun and with its heat used to generate energy. These applications are believed to be more suitable to human life and environment in the future. Greenhouse gases might be reduced gradually because with the new renewable technologies could emit less gas or even zero gas.
When many countries realize the effect of global warming may endanger future human life and environmental damages, they look at natural and renewable sources as energy alternatives such as water, ocean, wind, sunlight, solar, geothermal, biofuel and biomass which are quickly replenished and clean. Most of energy is derived from the sun and with its heat used to generate energy. These applications are believed to be more suitable to human life and environment in the future. Greenhouse gases might be reduced gradually because with the new renewable technologies could emit less gas or even zero gas.
Wind power is commonly used in several countries as an electric generation and it is very safe because it produces no greenhouse gas. Since it depends on heat and wind strengths are vary, this would be the weakness to supply continuously power. Therefore wind power can only be allocated in area with stronger and constant wind. Furthermore, wind power needs a huge landscape. Water power or known as Hydropower is widely used to generate electricity. It has been said that the water power is the oldest energy sources since long time ago. But because of poor technology in the past, it was only able to supply power in the very limited range. Though water power contributes very little impact to the greenhouse gas but some environmental impacts may take in account. Such as building dam or reservoirs often slash forest, affect natural habits, ecosystem or even human right abuses. The Yangtze Three Gorges Project would be the largest hydropower ever made, probably is the best example of benefits and impacts of using hydropower energy. Solar energy is derived from the energy collected from the sunlight which can be converted into form of energy such as electricity and heat. This solar energy is very useful to heat homes, water, swimming pools, agriculture and other applications. However, its limitation due to the amount of sunlight received is depend on climate, location and time, solar energy needs more landscape to be able to capture significant sun energy. Solar power in its production has resulted no air or water pollutions. Geothermal energy is the heat generated within the earth. This steam and hot water from inside the earth are continuously replenished by rainfall. Therefore, this would be suitable for power plants and heaters because geothermal energy is unaffected with the weather changes and contributes very low greenhouse gas. Geothermal reservoirs are often founded in geyser, volcanoes and hot spring. It has limitation because only found in selected areas and the reservoirs might get cooler in the future. Biomass is produced by natural plants and recent death animals. By process photosynthesis, plants adsorb sun energy and convert it into chemical energy. Biomass fuel includes wide range of renewable sources such as woods, crops, manure, organics and even waste or garbage. It could be altered into ethanol, biodiesel, biobuthanol, biogas and etches. Landfill which produces methane gas but by burning it to produce steam can supply heat and power plants. However, biomass trash or garbage must be renewable such as animals’ or plants’ trash and other food scraps, lawn clipping and leaves.
Probably by mixing conventional and renewable energy sources gradually would be able to reduce greenhouse gases and save our earth for further destruction. Though, energy alternatives must avoid unrest such as food crisis and human rights abuses.
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