Tourism continues to expand in Arizona, a boon for jobs, development and tax revenue, but the growth presents challenges to preserving the natural beauty drawing visitors to the state.... Read more»
A mature tamarisk, also known as saltcedar, can consume 200-300 gallons of water a day and produce up to 250 million tiny seeds annually that are spread easily by the wind. ... Read more»
With their natural beauty and protected environments, the Grand Canyon and other national parks in the West would seem removed from having mercury in their streams and rivers. But a federal study found small levels of the contaminant in rainbow and brown trout at three Grand Canyon creeks, as well as in fish at 20 other parks.... Read more»
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