A clean renewable energy source is a power source that does not come from non-renewable sources. This can include fossil fuels, such as oil and coal, or from natural resources, like the sun and the wind.
There are several clean renewable energy sources, including hydropower, wind power, solar energy, geothermal, biomass and ocean energy. These options are being explored by various countries to solve their energy challenges.
Solar energy is a good example of the cleanest renewable energy because it does not release carbon dioxide. It does, however, require a lot of infrastructure to harness its potential.
Wind power uses the kinetic energy of the wind to move turbines. The cost of manufacturing a wind turbine has lowered dramatically in the last decade, but it is not free.
Hydropower uses the flow of water from rivers to create electricity. The best sites are often far away from the population. However, dams can change the environment and wildlife will need to adapt.
Renewable energy sources have been around for thousands of years. However, it was during the industrial revolution that people began to focus on the environmental impacts of particular technologies.
Today, people are more focused on the sustainability of the energy supply. In fact, there is a growing amount of popular support for alternative energy sources.
Several countries have established policies to utilize clean renewable energy. They include China and India, which are two of the largest players in the global climate debate.