"Renewable energy utilizes natural cycles and systems-such as sunlight, wind, tides, and geothermal heat-to harness natural energy.
In the following viewpoint, the Environmental Literacy Council (ELC) argues that renewable energy sources-wind, solar, hydropower, geothermal, and biomass-can help fight climate change because they generally have fewer greenhouse gas emissions than fossil fuels. However, renewable energy sources do have some associated pollution and currently they are expensive. The ELC says further investment in research and development is needed to promote renewable energy. The Environmental Literary Council is a nonprofit organization that provides educational tools and resources on environmental issues.
As you read, consider the following questions:
According to the Environmental Literacy Council (ELC), what is the largest source of energy at the present time?
Which two renewable energy sources does the ELC say are intermittent?
According to the ELC, what is the main obstacle to using renewable energy sources?