What is more effective for protecting the environment – energy efficiency or the use of renewable energy?
Both. However, for a variety of economic and socio-political reasons, renewable energy is more expensive than energy derived from fossil fuels. Therefore, the implementation of energy-efficiency measures is usually a more cost-effective and attainable method of reducing the impact of fossil fuels on the environment. In fact, some energy efficiency measures can pay for themselves within a relatively short amount of time and then go on to save money for a homeowner many years into the future.