A pumpjack pumping an oil well near Lubbock, Texas
A sample of medium heavy crude oil
An oil derrick in Okemah, Oklahoma in 1922
Typical Brazilian fuel station with a choice of four fuels available: diesel (B3), gasoline (E25), neat hydrous ethanol (E100), and natural gas (CNG). Piracicaba, São Paulo, Brazil
Athabasca oil sands, sometime between 1900 and 1930
An oil field in California, 1938
Protestors demonstrate against fracking in New York
The Castle Gate coal-fired power plant near Helper, Utah, 2007
A Wyoming strip mine
Aerial image of a coal fly ash slurry spill in Kingston, Tennessee, taken the day after the spill in December 2008
Coke oven at a smokeless fuel plant in Wales, United Kingdom
A post card from Galicia, dated 1881
Canadian protesters object to expansion of oil projects on Parliament Hill in Ottawa in September 2011
Coal cars pass through St. Paul, Minnesota
Polar bears in the Arctic National Wildlife Refuge
A offshore oil drilling rig in the North Sea
Cygnet, Ohio was a booming oil town with 13 saloons and many workers when this photo was taken in 1885.
The hydroelectric Norris Dam, a TVA project, in 1937.
A U.S. oil tanker in the Mediterranean Sea during World War II
General Motors Urban Electric Car gets a battery charge from an outlet in the parking lot at the first symposium on low pollution power systems development held at the Mariott Motor Inn, Ann Arbor, Michigan, in 1973.
A modern electric car in France
The Hoover Dam when completed in 1936 was both the world's largest electric-power generating station and the world's largest concrete structure.
Brazos Wind Farm, also known as the Green Mountain Energy Wind Farm
President Barack Obama talks at the DeSoto Next Generation Solar Energy Center in October 2009.
President Barack Obama, Col. Dave Belote, and Sen. Harry Reid tour the Nellis Air Force Base photovoltaic array