Oil prices briefly rose above $100 a barrel last week on news of a pipeline deal that would cut a glut of U.S. inventories. There are plans to reverse the flow of the Seaway pipeline. Prices have dipped since then, but not enough to soften historic highs for diesel or home heating oil.
The electric car was just as popular as its gasoline counterpart when it first went into production around the turn of the 20th century. But with the advent of highways, people wanted to go farther than their battery life allowed. Today's electric cars face similar challenges.
Every year, millions of Sikhs flock to the holy city of Amritsar in northern India, adding heavily to the city's carbon footprint. Now, officials and activists are encouraging environmentally friendly practices such as using solar energy and reducing waste.
Using a mobile gas sensor, researchers have found more than 4,000 significant natural gas leaks while driving through Boston-area roads. The city's gas infrastructure is currently being fixed up, but methane in the leaked natural gas has the potential to harm trees and dry out soil.
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