Energy sources, particularly fossil fuels, are the top hand contributors in damaging our environment, including air and water pollution, wildlife loss, water usage, and global warming.

Renewable energy, on the other hand, is usually considered to be an appropriate alternative energy source as it has the capability of reducing greenhouse gas emissions as well as maintaining its environmental pollution level to an acceptable limit. The other significant advantage of renewable energy sources is the possibility of supplying energy from local sources – wind, biomass, hydropower, etc., hence reducing the dependence on imported energy.

There is still a demand, however, of understanding the environmental impacts associated with renewable energy production from power sources such as wind, solar, geothermal, biomass, and hydropower.

The exact type and intensity of the environmental impact varies based on the specific technology used, the geographic location, and other external factors. By understanding the current and potential environmental issues associated with each renewable energy source, we can takes steps to effectively avoid or minimize these impacts as they become a larger portion of our energy supply.

This special issue emphasizes research papers in the area of renewable energy sources, such as wind power, solar energy, hydro-power, etc. The special issue also targets technical papers on optimizing the utilization of such energies to reduce the greenhouse gas emission and enhancing the existing technologies that positively impacts air and water quality as well as the environment at large.