27 9 月 The World Uses a Variety of Different Energy Sources
The world is awash with a variety of energy sources. Fossil fuels — including natural gas, oil and coal–accounted to more than 81 % of all energy consumed in 2018. Renewables, such as solar power, wind, hydroelectricity, and biomass, account for 14 percent. Nuclear energy is 5 percent. Different countries have different sources of energy to meet the needs of their economy and environmental concerns.
Nature’s energy can be found in a variety of forms such as wind, sun, waves and ocean. These primary sources transform into more efficient forms of energy, like electricity or heat, when they are harnessed. When those energies are exhausted, they turn into non-renewable energy sources.
The environment is damaged by many fossil fuels and also other non-renewable sources of energy. For instance, oil mining, can destroy the forests of the earth. Hydraulic fracture (fracking) can cause earthquakes as well as water pollution. Carbon dioxide is released when coal is burned which causes global warming.
Fortunately, some of the most promising sources of energy are renewable and sustainable. Wind, solar and hydropower, for example, generate electricity without the need to dig for new sources.
Other renewable energy sources are emerging, such as the wave and tidal power. To be used on an enormous scale, these technologies need to have effective distribution networks. This requires the use non-renewable energy sources to build these networks. As a result, these sources are not yet sufficient to meet the majority of our energy requirements. However, it’s important to keep in mind that prices for renewable energy equipment have decreased dramatically over the past few years, and efficiency is growing rapidly.
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