Why is there a search for alternative energy sources?

Traditional sources of energy – coal, gas, oil – are exhaustible, in addition, petroleum products are more valuable as a raw material, and not as a fuel. Also, the use of these fuels is very polluting for the environment.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.