"To accelerate construction of a national high-speed intercity passenger rail network, the Obama administration plans to invest $53 billion over six years, Vice President Joe Biden announced Tuesday."

"A truce called in a bidding war for Canada's Baffinland Iron Mines sets the stage for an environmental battle over the Arctic project and the impact of shipping the ore through ocean ice to world markets."

"LOS ANGELES — This auto-obsessed city — a place where people love their cars almost as much as they hate the traffic — has embarked on the biggest expansion of its mass transit system in decades, an effort to change the way people navigate its sprawling and clogged streets and freeways."

"The Obama administration plans to reallocate money designated for high-speed rail if the states granted the funds reject them."

As newly minted GOP governors vow to reject billions stimulus money going to their states for high-speed rail, the incoming chair of the House Transportation Committee envisions redirecting the money to the Eastern rail corridor that brings tourists to his state.

"Republicans running for governor in a handful of states could block, or significantly delay, one of President Obama’s signature initiatives: his plan to expand the passenger rail system and to develop the nation’s first bullet-train service."

Cyclists thrive where autos rule: Los Angeles, where smog and freeway have hitherto defined a lifestyle.

"The National Aeronautics and Space Administration has a 'critical responsibility' to the flying public to develop environmentally responsible solutions to the nation's most pressing aviation problems, NASA Administrator Charles F. Bolden Jr. said Wednesday."

"If the Chevy Volt's $40,000 price tag sounds a bit too steep, you could always go the do-it-yourself route of Oregon teenager Ashton Stark. He just finished a yearlong conversion of his grandfather's 1972 Volkswagen Super Beetle into an electric car."

"Each year, around a half a million people go whitewater rafting in Colorado, and the industry is a key economic driver in many rural towns. But in recent months, the issue of rafting and who can float through stretches of private property has divided the state."

"It's simply known as 'the wall,' a steel-and-concrete structure costing about $22 million that will be pounded deep into the floor of the Elizabeth River near one of the worst toxic-waste sites in Hampton Roads."

"The Army Corps of Engineers wants to use ash cast off from coal-fired electrical generation to shore up dozens of miles of Mississippi River levees, drawing fire from environmentalists worried that heavy metals from the filler might make their way into the river."

"U.S. EPA Administrator Lisa Jackson on Wednesday declared the entire concrete-lined Los Angeles River channel 'traditional navigable waters,' a designation crucial to applying Clean Water Act protections throughout its 834-square-mile urban watershed."

"Canada, which has a disputed sovereignty claim to the Northwest Passage, will require all larger ships plying the Arctic sea route to register starting on July 1, the government said on Tuesday."

"Billions of dollars of new business and tens of thousands of jobs will flow to four hub cities -- Los Angeles, Chicago, Orlando and Albany, N.Y. -- where plans for major high-speed rail networks are located, according to the U.S. Conference of Mayors."