Reuters

English Prime Minister Gordon Brown is confident that the 2012 Summer Olympics will bring a big economic benefit to London. But with costs rising beyond expectations, some are skeptical of the PM's prediction.

Rapid urbanization and dense cities with inadequate infrastructure are being cited as leading causes in the spread of dengue fever throughout Southeast Asia and the rest of the world.

Big metropolitan transit agencies are struggling through the recession, with many considering cutting services and raising fares, according to astudy by Transportation For America and Transportation Equity Network.

States are spending the vast majority of federal stimulus money on building or repairing roads and highways, according to a new study.

Back in September, we reported that the trust fund had to receive an $8 billion bailout. Reuters reports that a second bailout is required to prevent the fund from going broke by August. Sen. Boxer indicates she supports indexing the gas tax.

Five out of every six major U.S. cities claims sustainability is one of its top priorities.

A major retail and tourist project in Las Vegas -- what some are calling the largest project in the world -- is stumbling amid the recession. Its developers and the city are unsure of its future.

With severe budget shortfalls, Philadelphia has turned to its citizens to see where the city should make cuts and what citizens are willing to pay to save.

With urban farms sprinkled throughout the island, Cuba is proving to be one of the world's most successful models of how to integrate agriculture into urban areas.

Income inequality in U.S. cities rivals that of many African cities, which struggle with deep divides between the haves and the have-nots, according to a recent report from the United Nations.

In Prague, where graffiti is rampant, an art gallery has secured outdoor wallspace throughout the city and invited graffiti artists to use it as a canvas for 12 days.

In an effort to dissuade jaywalking, police in Shanghai are planning to publish pictures and videos of jaywalkers in newspapers and local TV to shame offenders.

Despite improved air quality, China says it has no plans to continue the car control measures it has enacted during the Olympics to clean the city's air.

The only modern building in Rome's historic center, a Richard Meier designed museum, is considered offensive enough that it may not last in its current form.

As the economy continues to struggle, many expect governments to increasingly look at privatizing roads and other infrastructure.

Chicago's Loop is becoming a hot neighborhood.

Riders of the New York MTA hit the transit agency with $1.2 billion in injury and damaged property claims, seriously impacting the affordability of transit.

Air pollution is so bad in Mexico City that residents have less sensitivity to smells, according to a recent study.

The epidemic of vacant housing is leading not just to squatting, but to people illegally 'renting' out homes they don't own.

While Americans have not turned to the bicycle as a mode of transportation in the same numbers seen elsewhere in the world, some predict that soaring gas prices and increased infrastructure investments could change that.