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20.07.2020 23:48

Биология

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Eco-friendly communities Read the question and choose the correct answer:
Solar energy
Solar energy comes from the Sun. Billions of years ago, the Sun contained huge amounts of hydrogen gas. The Sun has been changing this hydrogen into helium in a process known as nuclear fusion, which helps to form energy. After this process, the energy moves across the Solar System in the form of light and heat, and we can see this energy as it comes to the Earth. The Sun provides enough energy in just one hour to meet the energy needs of the Earth for a whole year, but we cannot use all this energy on the Earth.
Solar power is a renewable energy source, it is free and limitless. It is clean and environmentally friendly. It is convenient to use renewable energy in the countryside and is easy to install at private houses. However, the Sun only provides energy to the Earth during the day. So, we need to keep the energy when it is available and use it at another time. However, current levels of technology make this difficult to do.
What is the main limit to our use of solar energy?
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technology to keep it
easy to install
too much energy​