The world uses many different energy sources. In 2018, fossil fuels, such as oil, gas and coal, comprised more than 81 percent of energy consumed. Renewables, such as solar power, wind power, hydroelectricity and biomass, make up for 14 percent. Nuclear energy is responsible for another 5percent. Different countries employ different mixes of energy sources, and are able to balance economic needs with environmental concerns.

Energy is found in nature in many forms: sunlight, wind, waves, ocean and many more. When harnessed and transformed into more convenient forms of energy, such as electricity or heat, these are known as primary sources. These energies become non-renewable sources of energy when they are exhausted.

Many fossil fuels and some of the other nonrenewable energy sources have been causing environmental harm. Mining oil, for instance can cause the destruction of our forests of the earth. Fracking (hydraulic fracturing) can cause water pollution and earthquakes. The combustion of coal releases carbon dioxide, which contributes to global warming.

Fortunately some of the most promising sources https://leonardogiombini.it/2019/01/24/da-costruttore-le-biomasse-come-fondazioni of energy are renewable and sustainable. Hydropower, wind and solar for instance, could generate electricity without having to search for new resources.

Other renewable energy sources are emerging, like tidal and wave power. However, in order to be used on a massive scale, these technologies must have effective distribution networks. They need to be constructed, which requires the use of non-renewable energy. In the end, these sources are not yet capable of meeting the majority of our energy requirements. It is important to keep in mind that the cost of renewable energy equipment have fallen dramatically in recent years and the efficiency of these equipments is growing.