Related Topics:4. Various sources of energy are used to power human activities. 8. Wood based bio-fuels are one form of energy that is renewable
Associated Grade Levels:7-89-1011-12
4.3 Fossil and biofuels are organic matter that contain energy captured from sunlight.
8.6 Liquid fuel can be produced from wood feedstocks.
4.1 Humans transfer and transform energy from the environment into forms useful for human endeavors
4.2 Humans use of energy is subject to limits and constraints.