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In remote areas where clean water is scarce, Sarvajal's water-dispensing ATMs provide a cheap solution.

What's a concerned citizen to do? In an effort to reduce the amount of water the state imports, it's now producing an incredibly powerful greenhouse gas while it cleans its wastewater. Here’s a conundrum

Natural gas might burn much cleaner than coal, but getting it has its problems: leaky pipes. And those leaks spray gasses that are worse for the climate than carbon. Natural gas is a hot energy commodity right now, with new drilling techniques, low prices, a big domestic supply in the U.S., and the support of people like T

Combining principles of conservation with the needs of agriculture might be the only way to keep growing enough food to feed an exploding global population.

Usually, we're trying to keep plastic out of water sources, but it turns out that a little bit of plastic can go a long way in making contaminated water safer to drink. Most of the time, we want to make sure plastic stays out of water. It never biodegrades and is destroying our oceans and marine wildlife

We tend to take easy, safe access to potable water for granted until there's a shortage in access to it (like in Texas) or an overflow (as with Hurricane Irene). And in reality, there are a number of water risks that the world will face in the coming years, including deteriorating water quality, growing competition for limited access to resources, and an increase in water scarcity. The World Resource Institute's Water Risk Atlas outlines those risks--and gives a preview of what you can expect in your town or city in the coming years.

New renovations will let even "Post-Panamax" ships cross the isthmus, altering the economics of global shipping to the advantage of countries that produce cheap goods for the developed world. What a difference a century makes.

Cleaning the dirty water from our drains and toilets is an expensive and energy-sucking task.

A 61-year-old lifeguard is suing for age discrimination after he was fired for refusing to wear a Speedo.

For Douglas Meffert, those attempting to harness the water power of the Mississippi River aren't just scientists and engineers; they're visionaries who could transform the way power grids operate in the Southeast, and perhaps other areas of the United States. Meffert, a professor of bioenvironmental research at Tulane University, said that with his work, he's carrying on the mission of the late professor William Mouton, a revered New Orleans structural engineer, to end the southeastern United States' reliance on fossil-fuel energy from the Gulf of Mexico.

The Lone Star State may win the honor simply because it controls the ocean farther from the coast than most states, and the state has virtually no regulations when it comes to building. Cape Wind--the first offshore wind farm in the U.S. to receive the go-ahead for construction--has been mired in Kennedy-centered political problems for a decade

A 22-year-old inventor combines two old technologies into a bicycle that saves energy when it brakes and can then accelerate without pedaling. The technology of a flywheel is simple and old: Use energy to spin up a wheel very quickly.

Caffeine is a trickier substance than we generally acknowledge. Here's what you need to know to get more out of caffeine--starting with a suggestion to go cold turkey. Caffeine seems so simple, even if you're a veteran user.

They're one and two in the world yet just hanging on at the PGA Championship.

Jim Furyk has been mired in one of the worst slumps of his career.