The world uses a variety of energy sources. Fossil fuels — including natural gas, oil, and coal–accounted for more than 81 % of all energy consumed in the year 2018. Renewable energy sources like solar power, wind power biomass, hydroelectricity and biomass make up 14 percent. Nuclear energy is another 5 percent. Different countries utilize different energy sources to balance the needs of their economy and environmental concerns.
Nature’s energy comes in many forms such as wind, sun, waves and ocean. These sources of energy can be transformed into more practical forms of energy, like electricity or heat when they are harnessed. These sources of energy become non-renewable sources of energy once they have been exhausted.
The environment is harmed due to a wide range of fossil fuels in addition to other sources of energy that are not renewable. Mining oil, for instance can devastate the forests of the earth. Fracking (hydraulic fracturing) can result in water pollution and earthquakes. Carbon dal protocollo di kyoto e oltre dioxide is released when coal is burned and contributes to global warming.
Fortunately there are many promising sources of energy are renewable and sustainable. Wind, solar and hydropower for instance, can produce electricity without having to search for fresh supplies.
Tidal and Wave Power are two more renewable energy sources that are emerging. However, in order to be used at a large scale they must have efficient distribution networks. This requires the use non-renewable energy sources to build these networks. This means that these sources are not yet able to provide the bulk of our energy needs. It’s important to remember that the cost of renewable energy equipment has fallen dramatically in recent years and efficiency is growing.