Plenty of companies make water-efficient toilets these days, but replacing your old model with a newer one is an expensive endeavor -- and if you live in an apartment building, it's pretty much impossible. Here's an easy DIY way to make your toilet more efficient and save money and water at the same time.

Thanks to Jack Nicholson's Oscar-winning performance in Chinatown, the story of how Los Angeles stole the water from the Owens River may be the best-known environmental crime in U.S. history. (OK, I'm showing my age. Chinatown is from 1971, and in 2000 Erin Brockovich also brought home an Oscar for Julia Roberts. Brockovich is above-average entertainment. Chinatown is art.) But finally there's a happy ending.

Answer: Stainless steel water bottles are the way to go, especially for hot liquids. Make sure your stainless steel bottle doesn't have a plastic liner inside, which may leach bisphenol-A (BPA), an industrial chemical linked to birth defects of the male and female reproductive systems and other health concerns.

Every year, the Central Valley Project moves more than 2 trillion gallons of water - about 18 percent of California's fresh water supply - to thousands of farms in the state's arid heartland. Massive pumps push the water through 1,437 miles of canals.

A series of critical new studies by scientists at the Centers for Disease Control and Prevention (CDC) show that the EPA's proposed safe exposure level for the rocket fuel contaminant perchlorate is not protective of public health.

An Environmental Working Group (EWG) analysis of recently published data from scientists at the Centers for Disease Control (CDC) and Boston University (BU) shows that infants are being exposed to dangerous levels of the rocket fuel component perchlorate.

In a little-noticed but dramatic turnaround, the nation's leading fluoride advocate, The American Dental Association (ADA), issued an alert on November 9th urging parents to avoid fluoridated water when reconstituting infant formula.

Several years ago, concerned by the time and energy South African women spent fetching water from distant, often polluted sources, Trevor Fields decided to do something. Fields teamed up with an inventor to produce the PlayPump—a children’s merry-go-round, that when spun, pumps water from below ground to an above-ground storage tank. Each PlayPump costs about $14,000, but operating costs are nil since the pumps are run by kidpower.

A startling new study by the federal Centers for Disease Control (CDC) says minute traces of a toxic rocket fuel chemical found in milk, fruit vegetables and drinking water supplies nationwide lowers essential thyroid hormones in women.