Renewable resources are those natural resources that will gradually be able to replenish themselves despite some depletion. The era of renewable resources and alternative energy has arrived. It’s cheaper now than ever before to generate electricity from renewable resources, catapulting them from fringe options to the fastest-growing energy resources in the country. These renewable resources include alcohol, water, methane gas, natural oils, and thermal generation. In 2017, renewables set a record in the U.S. by generating 15% of all electricity, predominantly due to hydropower, solar and wind. What are some other examples of renewable energy? We’ll go down the list.