The advantages of petroleum include a high-energy density, making it a cost-effective source of fuel; easy extraction, which occurs thanks to sophisticated machinery; easy transportation and versatile uses. Petroleum cla... More »

The biggest advantage of oil drilling in Alaska is economic. The oil industry pays the state of Alaska billions of dollars yearly in taxes and also provides jobs and income for many state residents. Oil produced domestic... More »

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According to National Geographic, non-renewable energy sources, such as fossil fuels, are energy dense and easy to extract and transport, but the ecological damage caused by burning such fuels makes them a dangerous opti... More »

Wind energy is praised for being a renewable, nonpolluting source of electricity, but it can also produce intermittent streams of energy, and wind-generating equipment may be costly and troublesome to repair and maintain... More »

The Amazon River and its tributaries are important for local agriculture, for transportation and as a source of hydroelectric power. Unfortunately, the Amazon's economic value is also a leading cause of environmental deg... More »

Smelting waste, commonly called slag, is the byproduct of metal extraction from natural ores. It is usually composed of metal oxides and a significant amount of silicon dioxide. Slag can be used to modulate the chemistry... More »

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The extraction and combustion of coal negatively impacts the environment, causing water and air pollution, acid rain, mountaintop depletion and acid mine drainage. Harmful emissions from incomplete burning of coal also p... More »