The world uses a variety of energy sources. In 2018 fossil fuels like gas, oil and coal, accounted for over 81 percent of the energy consumed. Renewables, like solar power, wind, hydroelectricity and biomass, account for 14 percent. Nuclear energy contributes another 5 percent. Different countries have various energy sources, while balancing economic needs with environmental concerns.

Nature is a rich source of energy in a number of forms: sunlight winds, waves oceans and more. When harnessed, and transformed into more convenient forms of energy, such as heat or electricity, these are called primary sources. When these energy sources are exhausted, they become nonrenewable energy sources.

Many fossil fuels as well as some of the other sources of energy that aren’t renewable are damaging the environment. For instance, mining for oil can take away the planet’s forests. Hydraulic fracture (fracking) can trigger earthquakes and pollution of water. Carbon dioxide is released when coal is burned, which contributes to global warming.

Fortunately, some of the most promising energy sources are sustainable and renewable. Solar, wind and hydropower can generate, for instance electricity without digging up new sources.

Other renewable energy sources are gaining momentum, such as tidal and wave power. In order to be utilized at large scale, these sources of energy require effective distribution networks. This requires the use of non-renewable energy sources to build these networks. These sources are not able to meet the majority https://leonardogiombini.it/2019/03/01/le-biomasse-i-processi-termochimici of our energy demands. It’s vital to remember that the cost of renewable energy equipment has drastically decreased in recent years and efficiency is growing.