In simpler and perhaps less environmentally sensitive times of the mid-1970s, a whitewater enthusiast drove a bulldozer into the Animas River to push a boulder downstream and remove an obstruction for sports like kayaking and rafting, says longtime paddler John Brennan.

Colorado’s cloud-seeding program for the central mountains ended April 10, just as a series of strong spring storms rolled into the area.

A number of water bills introduced by Sen. Mary Hodge have been signed by Gov. John Hickenlooper.

New discoveries of the way plants transport important substances across their biological membranes to resist toxic metals and pests, increase salt and drought tolerance, control water loss and store sugar can have profound implications for increasing the supply of food and energy for our rapidly growing global population.

Using the same devious mechanism that enables some bacteria to shrug off powerful antibiotics, scientists have developed solar-powered nanofilters that remove antibiotics from the water in lakes and rivers twice as efficiently as the best existing technology. Their report appears in ACS' journal Nano Letters.

The ratio of carbon dioxide in Earth’s atmosphere is flirting with 400 parts per million, a level last seen about 2.5 million to 5 million years ago, according to the Scripps Institution of Oceanography at UC San Diego. The Institution this week launched a daily Keeling curve update, showing the saw-toothed upward diagonal of rising carbon dioxide levels since the late 1950s.

Electra Lake will be closed to recreation this summer to allow Xcel Energy to repair the 30-year-old dam. “The public will not have access to recreation from late May into the late fall,” company spokesman Mark Stutz said Monday.

Like a pitcher taking the mound on opening day, Frank Gehrke gets the spotlight in California every early April.

Colorado lawmakers in Washington, D.C. are reaching across party lines to try and protect more than 100,000 acres of the Hermosa Creek watershed north of Durango. U.S. Senator Michael Bennet (D-CO) and Rep.

The nation is seeing a sharp divide between dry and wet as summer approaches: While the eastern USA is almost entirely drought-free, drought continues to persist and intensify in much of the country to the west of the Mississippi River. Many areas of the West are ending the wet season with "bleak spring runoff prospects and increasing drought concerns," according to this week's U.S.