Air pollution is changing plant odors, which confuses bees and makes them less efficient at foraging and pollinating plants, Penn State researchers said in a new study that shows how ozone breaks down plant-emitted scent molecules.
The chemical interactions decrease both the scent molecules’ life spans and the distances they travel, the scientists reported in the new study. They found that plant-emitted hydrocarbons break down through chemical interactions with certain air pollutants such as ozone. This breakdown process results in the creation of more air pollutants, including hydroxyl and nitrate radicals, which further increase the breakdown rate of plant odors. Continue reading “Air pollution seen as another factor in honeybee decline”→
State fails to meet EPA standard set to protect public health; ozone problems to worsen with global warming
By Bob Berwyn
The modest steps taken by Colorado to try and improve air quality along the Front Range aren’t enough, according to the EPA. This week, the federal agency said the state has failed to meet air quality standards set to protect public health.
Legal challenge seeks to hasten the end of the fossil fuel era in the Southwest
A coalition of environmental and community groups is challenging the federal government’s decision to extend operations at the coal-fired Four Corners Power Plant for another 25 years. In a new lawsuit, the activists say the approval lacked an assessment of clean energy alternatives.
New regs could avoid the equivalent of 11 million tons of CO2 emissions
The EPA wants to end the use of some industrial coolants that are up to 10,000 times more potent heat-trapping substances than CO2. At the same time, the agency is expanding the list of chemicals that are acceptable as safer and “more climate-friendly alternatives.”
People everywhere like to complain about excessive government regulation, and the European Union is no exception. But it’s clear, from a new University of Leeds study, that air quality rules in the EU have saved thousands of lives in recent decades.
As a result, watchdog groups say the agency has fallen short, and the Center for Biological Diversity says it will sue the EPA because 17 states and the District of Columbia have failed to reduce ozone pollution, which poses serious threats to public health, wildlife and ecosystems. Essentially, environmental activists say the EPA has failed to meet standards set under the Clean Air Act. Continue reading “Environment: EPA faces ozone lawsuit”→
Local, regional controls help improve global picture
Global mercury emissions dropped by nearly a third between 1990 and 2010, according to a new study that tried to identify patterns and trends in mercury pollution.
Rapid economic development in Asia means higher mercury emissions, but reductions in North America were enough to offset the increases, according to scientists from China, Germany, Canada and the U.S.
Mercury is a metallic element that poses environmental health risks to both wildlife and humans when converted to methylmercury in ecosystems. It can be converted into gaseous emissions during various industrial activities, as well as natural processes like volcanic eruptions. Continue reading “Study tracks big drop in global mercury emissions”→