Solar energy :

1. The sun produces energy in the form of heat and light. Solar energy is not harmful to the environment.

2. Photovoltaic devices or solar cells, directly convert solar energy into electricity.

3. India, China, Japan, Italy and States of America are major utilizers of solar energy in the world. 

Hydropower: 

1. Hydroelectricity power is the cheapest and most versatile source of energy out of all the know energy. Hydroelectric power is a renewable resource. 

2. China, Canada, Brazil, United States of America, Russia, India, Norway and Japan are some countries producing hydroelectricity. China is the largest producer of hydro-electricity.

Wind energy :

1. Wind power is clean energy since wind turbines does not produce any emission.

2. In recent years, wind energy has become one of the most economical and renewable energy technologies. 

3. Major wind energy producing countries are United States, China, Germany, Spain, India, United Kingdom, Canada and Brazil.