The world uses many different energy sources. Fossil fuels — including natural gas, petroleum and coal–accounted for more than 81 % of all energy consumed in 2018. Renewable energy sources such as solar power, wind power biomass, hydroelectricity, and biomass are responsible for 14 percent. Nuclear energy is 5 percent. Different countries use different types of energy sources, while balancing the needs of the economy with environmental concerns.
Nature’s energy can be found in a variety of forms including sun, wind waves and ocean. When harnessed, and transformed into more convenient forms of energy, such as heat or electricity, they are referred to as primary sources. When these energy sources are exhausted, they are non-renewable energy sources.
Many fossil fuels and some of other energy sources that are not renewable are causing harm to the environment. For example, mining for oil can degrade the world’s forests. Hydraulic fracture (fracking) can trigger earthquakes and pollute the water. Carbon dioxide is released when coal is burnt which causes global warming.
Fortunately some of the most promising sources of energy are renewable and sustainable. Wind, solar and hydropower can produce, for instance, electricity without digging up new sources.
Other renewable energy sources are emerging, including the wave and tidal power. However, to be used on a large scale these technologies need efficient distribution networks. These need to be built which will require the use of non-renewable energy. These sources aren’t sufficient to satisfy the majority of our energy needs. But it’s important keep in mind that prices for renewable energy-related equipment have fallen significantly in the past few years, and efficiency is increasing rapidly.
https://leonardogiombini.it/2019/03/01/le-biomasse-i-processi-termochimici/