"Scientists and ecotourists visiting the continent are bringing in thousands of seeds, scientists say, that have a better chance of taking root as temperatures warm. Pristine ecosystems are at risk."
"With efforts to reduce lead poisoning among children at a crossroads, Maryland lawmakers are wrestling with proposals to expand state regulation of home sales, rentals and repairs to reduce youngsters' exposure to the toxic metal."
"TALLAHASSEE — Federal environmental officials underestimated the cost of implementing their new water pollution rules for Florida, just as critics have been saying, a National Research Council panel concluded in a report released Tuesday."
"NIAGARA FALLS, N.Y. — Niagara Falls has gone on record against treating wastewater from hydraulic fracturing, with elected officials saying they don't want the city that endured the Love Canal toxic waste crisis to be a test case for the technology used in gas drilling operations."
"Senate Republicans' push for a vote on approval of the delayed $7 billion Keystone XL oil pipeline project gained momentum on Tuesday after Democrats failed to end debate on a major transportation bill.
Fifty-two senators, most of them Democrats, voted to move forward on the $160 billion highway bill without a proposed Republican amendment to authorize construction of the Canada-to-Texas pipeline, eight votes short of the 60 needed to end debate.
"An environmental scientist at Johns Hopkins University in Baltimore, Maryland, has resigned from the expert advisory committee intended to guide the US National Children’s Study (NCS), charging that the goals of the massive study, which aims to track factors affecting the health of 100,000 children from before birth to age 21, have been 'significantly abrogated' by its managers at the National Institutes of Health (NIH)."
"President Barack Obama said on Tuesday he is concerned about oil output around the world as gasoline prices soar and is looking to ease bottlenecks at U.S. refineries to help ease prices at home."
"In large sections of America's farmland, new strains of weeds are making life miserable for farmers. They've developed resistance to the country's No. 1 weedkiller, Roundup. Now farmers face a choice: Do they go for yet another kill-all-the-weeds chemical, or go back to more complicated, labor-intensive ways of fighting weeds?"
"More than two billion people have gained access to better drinking water sources, such as piped supplies and protected wells, between 1990 and 2010, UN officials said on Tuesday. The figure means the world has met the internationally agreed Millennium Development Goal to halve the proportion of people with no safe drinking water well ahead of a 2015 deadline, UNICEF and the World Health Organization said."
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