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Monarch Migration Patterns Yield Clues About Pollinator Declines
A comprehensive mapping of the the North American migration patterns of the iconic monarch butterfly could help preserve a species threatened by loss of habitat and food sources, a team of international researchers says.
In a study conducted across 17 U.S. states and two Canadian provinces, from southern Texas to Alberta, biologists from Canada, the U.S. and Australia tracked the northward migration of the monarchs, documenting several generations in a single breeding season.
By analyzing a chemical signature found on the adult butterflies’ wings that reveals their specific birthplace, scientists were able to document a breeding “explosion” in the U.S. Midwest, from which many butterflies then travel north into Alberta. According to Tyler Flockhart, a PhD. student at the University of Guelph in Canada and lead author of the study published in the Proceedings of the Royal Society B, the decline in milkweed and a surge in genetically modified crops might be affecting monarch survival.
“If habitats in the Midwest continue to decline, then monarchs will lose the ability to expand the breeding range, including those butterflies that end up here in Ontario,” he said. Earlier this year, a census at the butterflies’ wintering grounds in Mexico found that population levels were lower than ever previously measured.
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Oil rigs around the world keep pulling crude oil out of the ground, but the global pandemic has sent shockwaves into the market. The supply is up, but demand has plummeted now that industry has ground to a halt, highways are empty, and airplanes are parked in hangars.
Under an agreement negotiated by community groups — represented by NRDC and the Pennsylvania Utility Law Project — the Pittsburgh Water and Sewer Authority (PWSA) will remove thousands of lead water pipes by 2026 in order to address the chronically high lead levels in the city's drinking water and protect residents' health.
By Dave Cooke
So, they finally went and did it — the Trump administration just finalized a rule to undo requirements on manufacturers to improve fuel economy and reduce greenhouse gas emissions from new passenger cars and trucks. Even with the economy at the brink of a recession, they went forward with a policy they know is bad for consumers — their own analysis shows that American drivers are going to spend hundreds of dollars more in fuel as a result of this stupid policy — but they went ahead and did it anyway.
By Richard Connor
A blood test that screens for more than 50 types of cancer could help doctors treat patients at an earlier stage than previously possible, a new study shows. The method was used to screen for more than 50 types of cancer — including particularly deadly variants such as pancreatic, ovarian, bowel and brain.
Preliminary data from the Centers for Disease Control showed a larger number of young people coming down with COVID-19 than first expected, with patients under the age of 45 comprising more than a third of all cases, and one in five of those patients requiring hospitalization. That also tends to be the group most likely to use e-cigarettes.