Final answer:
Renewable energy refers to energy from sources that are naturally replenished like solar, wind, water, and biomass. These sources are sustainable, reduce greenhouse gas emissions, and offer decentralized power, though they have limitations in concentration and transportability.
Step-by-step explanation:
Renewable Energy Overview
Renewable energy is defined as energy that comes from resources which are naturally replenished on a human timescale. Unlike fossil fuels like coal and oil, which can be depleted, renewable energy sources such as solar, wind, water, and biomass are not permanently used up when harnessed. Solar energy, for example, utilizes the sun's power, which is an 'unlimited' source of energy and can be replenished continuously. Wind energy is captured through turbines, as seen in modern wind farms, and water's kinetic power can be used to generate electricity via hydropower.
One of the main advantages of renewable energy is that it does not contribute to greenhouse gas emissions or air pollution, and thus, plays a significant role in combating climate change. Additionally, renewable sources allow for decentralized power production, enabling local generation and reducing the need for fossil fuel transport and associated environmental risks.
It is also important to note that while renewable energy has great potential, limitations exist, such as the current inability to easily concentrate and transport these forms of energy. Even with these limitations, there's a projected increase in the global consumption of renewable energy, signifying its growing importance.