"MIDDLESEX, Pennsylvania — If you stand beside Bob and Kim Geyer’s farm on Denny Road at 3:30 p.m. on a Wednesday, it is mostly quiet, except for the faint sounds of the local high school’s flag team band practicing in the distance."

"More than two-thirds of the recent rapid melting of the world's glaciers can be blamed on humans, a new study finds."

"Low rainfall linked to the El Nino weather phenomenon has led to drought in parts of Central America, causing widespread damage to crops, shortages and rising prices of food, and worsening hunger among the region's poor."

"A new concessions contract for businesses on the South Rim of Grand Canyon National Park will cost the park $100 million, an amount that could impact just about all operations in the park, Superintendent Dave Uberuaga said Wednesday. In the long run, however, the move stands to benefit both the park and its visitors, observers believe."

"EDMONTON -- Warnings about higher levels of air pollution in the oilsands have emerged in a new provincial air quality report that calls for further investigation into possible pollution sources."

"The ancestral connections of tribal coastal communities to the ocean’s natural resources stretch back thousands of years. But growing acidification is changing oceanic conditions, putting the cultural and economic reliance of coastal tribes—a critical definition of who they are—at risk."

"In Pennsylvania’s Susquehanna River, one of the longest in the northeast, male smallmouth bass are sprouting female egg cells in their testes. According to a United States Geological Survey report released in June, these intersex fish appear in water — both in this river and two others in the state — that has become saturated with estrogenic compounds, natural and artificial hormones in animal manure and, to a smaller degree, sewage."

"CONAKRY, Guinea -- Staff with the World Health Organisation battling an Ebola outbreak in West Africa see evidence the numbers of reported cases and deaths vastly underestimates the scale of the outbreak, the U.N. agency said on its website on Thursday."

"A federal magistrate has dismissed most of a lawsuit by environmental advocates challenging the government's approval of numerous pesticides, but said they can pursue claims that federal officials allowed 11 chemicals on the market without getting up-to-date information about hazards to endangered species."

"The Environmental Working Group said Thursday there are nine elementary schools in Iowa that are within 200 feet of a corn or soybean field, a concern the green group highlighted as regulators consider whether to approve a controversial new herbicide."