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Time was, Americans didn't worry much about miles per gallon. The first cars had small engines and got stellar gas mileage--as high as 21 m.p.g. for the Model T. But as vehicles got faster and larger and grew tail fins, efficiency plummeted. Congress didn't set fuel standards until after the oil embargo of 1973. By 1985, efficiency had improved dramatically, but momentum slowed as the government let standards stagnate. President Barack Obama's support for raising fuel efficiency to 35 m.p.g. by 2020--a move that could save 2 million bbl. of oil a day--has environmentalists...
...Fuel efficiency plateaued as car companies focused on other gas-guzzling consumer demands...
Sources: Environmental Protection Agency, National Highway Traffic Safety Administration. *The "Fleet m.p.g." above reflects conditions produced in a lab. Actual on-road fuel efficiency is lower--24.1 m.p.g. for cars and 18.1 m.p.g. for trucks...
Renewable energy, it turns out, does grow on trees. The fruit pods plucked from jatropha trees have seeds that produce clean-burning diesel fuel. But unlike corn and other biofuel sources, the jatropha doesn't have to compete with food crops for arable land. Even in the worst of soils, it grows like weeds. Sound too good to be true? That's why brothers Paul and Mark Dalton chose to name their Florida jatropha company My Dream Fuel...
...other disputes with India. Zardari's Op-Ed noted that the two countries are currently arguing about water from rivers that flow through both countries; Pakistan says it is denied a rightful share of the water by Indian dams. Failure to resolve the water dispute, Zardari warned, "could fuel the fires of discontent that lead to extremism and terrorism." (See pictures of Pakistan's vulnerable northwest passage...