The companies that operate in the energy sector all operate with energy, whether renewable or not. All the resources that used in certain ways can lead to energy are part of the energy sector.
Most of the companies that operate in the energy sector are listed on the stock exchange and the changes in the price of their shares vary largely from the political changes of the moment.
An example is the price of oil, which often varies due to internal wars in the producing areas.
Investing in the energy sector, especially in the most innovative proposals, can now be a good way to increase one’s capital.