![A pumpjack pumping an oil well near Lubbock, Texas A pumpjack pumping an oil well near Lubbock, Texas](/sites/default/files/styles/large/public/4-2-img1440_0.jpg?itok=Jfmfqsqi)
Source: Flcelloguy
Source: Glasbruch2007 at en.wikipedia
![An oil derrick in Okemah, Oklahoma in 1922 An oil derrick in Okemah, Oklahoma in 1922](/sites/default/files/styles/large/public/4-2-img1444_0.jpg?itok=61M8y1Lp)
Source: national archives
![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 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](/sites/default/files/styles/large/public/4-2-img1448_0.jpg?itok=yHMOXWsJ)
Source: Mario Roberto Duran Ortiz
![Athabasca oil sands, sometime between 1900 and 1930 Athabasca oil sands, sometime between 1900 and 1930](/sites/default/files/styles/large/public/4-2-img1451_0.jpg?itok=8Y0JDZ3h)
Source: Library and Archives Canada
![An oil field in California, 1938 An oil field in California, 1938](/sites/default/files/styles/large/public/4-2-img1453_0.jpg?itok=uPqK2FbB)
Source: U.S. Library of Congress
![Protestors demonstrate against fracking in New York Protestors demonstrate against fracking in New York](/sites/default/files/styles/large/public/4-2-img1454_0.jpg?itok=ompeLuLo)
Source: Owen Crowley
Source: David Jolley
![A Wyoming strip mine A Wyoming strip mine](/sites/default/files/styles/large/public/4-2-img1456_0.jpg?itok=uBfcOGIC)
Source: Bureau of Land Management
![Aerial image of a coal fly ash slurry spill in Kingston, Tennessee, taken the day after the spill in December 2008 Aerial image of a coal fly ash slurry spill in Kingston, Tennessee, taken the day after the spill in December 2008](/sites/default/files/styles/large/public/4-2-img1458.jpg?itok=Urq-xf92)
Source: Tennessee Valley Authority
![Coke oven at a smokeless fuel plant in Wales, United Kingdom Coke oven at a smokeless fuel plant in Wales, United Kingdom](/sites/default/files/styles/large/public/4-2-img1459.jpg?itok=yaAKt2hE)
Source: Velela
![A post card from Galicia, dated 1881 A post card from Galicia, dated 1881](/sites/default/files/styles/large/public/4-2-img1463.jpg?itok=lnmln8Aj)
Source: public domain
![Canadian protesters object to expansion of oil projects on Parliament Hill in Ottawa in September 2011 Canadian protesters object to expansion of oil projects on Parliament Hill in Ottawa in September 2011](/sites/default/files/styles/large/public/4-2-img1464.jpg?itok=01XjGdMN)
Source: photo by Peter Blanchard
![Coal cars pass through St. Paul, Minnesota Coal cars pass through St. Paul, Minnesota](/sites/default/files/styles/large/public/4-2-img1466.jpg?itok=3sRNmoHx)
Source: photo by Greg W.
![Polar bears in the Arctic National Wildlife Refuge Polar bears in the Arctic National Wildlife Refuge](/sites/default/files/styles/large/public/4-2-img1467.jpg?itok=uODfCt-j)
Source: Alan D. Wilson
![A offshore oil drilling rig in the North Sea A offshore oil drilling rig in the North Sea](/sites/default/files/styles/large/public/4-2-img1468.jpg?itok=PoXibSd5)
Source: Erik Christensen
![Cygnet, Ohio was a booming oil town with 13 saloons and many workers when this photo was taken in 1885. Cygnet, Ohio was a booming oil town with 13 saloons and many workers when this photo was taken in 1885.](/sites/default/files/styles/large/public/4-2-img1470.jpg?itok=-vkKd9Dc)
Source: Ohio Department of Natural Resources, Division of Geological Survey
![The hydroelectric Norris Dam, a TVA project, in 1937. The hydroelectric Norris Dam, a TVA project, in 1937.](/sites/default/files/styles/large/public/4-2-img1472.jpg?itok=sFWA9jnh)
Source: National Records and Archives Administration
![A U.S. oil tanker in the Mediterranean Sea during World War II A U.S. oil tanker in the Mediterranean Sea during World War II](/sites/default/files/styles/large/public/4-2-img1473.jpg?itok=umDb1Suk)
Source: U.S. Navy
![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. 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.](/sites/default/files/styles/large/public/4-2-img1475.png.jpg?itok=gU46yQ3I)
Source: National Records and Archives Administration; photo by Frank Lodge
![A modern electric car in France A modern electric car in France](/sites/default/files/styles/large/public/4-2-img1477.jpg?itok=s_Gdc-Uq)
Source: photo by Ian Britton
![The Hoover Dam when completed in 1936 was both the world's largest electric-power generating station and the world's largest concrete structure. The Hoover Dam when completed in 1936 was both the world's largest electric-power generating station and the world's largest concrete structure.](/sites/default/files/styles/large/public/4-2-img1478.jpg?itok=FWqZyzXL)
Source: Tobi 87
![The Brazos Wind Farm, also known as the Green Mountain Energy Wind Farm, near Fluvanna, Texas. The Brazos Wind Farm, also known as the Green Mountain Energy Wind Farm, near Fluvanna, Texas.](/sites/default/files/styles/large/public/4-2-img1479.jpg?itok=NAmydGLH)
Source: Leaflet
![President Barack Obama talks at the DeSoto Next Generation Solar Energy Center in October 2009. President Barack Obama talks at the DeSoto Next Generation Solar Energy Center in October 2009.](/sites/default/files/styles/large/public/4-2-img1482.jpg?itok=w2xzJXzl)
Source: White House Photographer Jesse Lee
Source: U.S. Air Force photo by Nadine Y. Barclay