Oil is now running through the southern part of the keystone XL pipeline. Supporters and opponents will be watching carefully to see what that could mean for the northern section of the project, that still awaits approval from the Obama administration.
This week in Iran, international inspectors are stepping up surveillance of the country's nuclear program. The inspections are at the heart of a landmark deal that freezes Iran's uranium enrichment in exchange for billions of dollars in relief from sanctions, but they are just a first step.
Hybrids and battery-powered cars are all the rage, but some car companies are investing in an older technology: diesel. The newest vehicles are cleaner and more powerful, and some drivers report getting up to 50 mpg. So what's keeping U.S. customers from switching pumps?
Pennsylvania is the fastest-growing state for natural gas production, but the development is cutting through swathes of previously unbroken forests. Some scientists say this could affect wildlife, which perform important functions like climate and insect control.
The country is producing more natural gas than it can burn, but frigid weather has made it harder for companies to deliver that gas to those who need it, especially in densely populated areas in the Northeast. As a result, prices have skyrocketed.
Toyota, Honda and Hyundai have announced that they plan to build hydrogen-powered cars in the next few years. But is America ready for automobiles fueled with liquid hydrogen? Take a test-drive in one and find out.
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