In fact, this is also an important question. Many research centers today are working to find ways to reduce the cost of energy production in its various forms, including green renewable energies. The biggest obstacle to this step is the costs of establishing power stations, since raw materials are not easily available and companies are still competing to monopolize, which raises their prices.
The world must unite to achieve this, and it cannot succeed if each country continues to operate independently, and this is the same case for companies working in the field as well.