Despite report after report linking air pollution to deterioration of the lungs, heart and brain, Professor Robert Phalen believes the air is “too clean” for children.

After all, everybody needs a bit of immune-system-boosting dirt in their lungs.

“Modern air is a little too clean for optimum health,” he told the American Association for the Advancement of Science (AAAS), one of the world’s largest scientific societies, in 2012.

Some impacts of global warming – such as sea level rise and coastal flooding – are already locked in and unavoidable, according to a major research project. 

Individuals who have A, B, or AB blood types have an elevated risk of having a heart attack during periods of significant air pollution, compared to those with the O blood type, according to new research from the Intermountain Medical Center Heart Institute and Brigham Young University.

The new study is unique in that it links increased risk of heart attack associated with small particulate pollution to increased risk of heart attack for people with certain blood types who have coronary artery disease.

Traditional toxicity testing underestimates the risk that pharmaceutical and personal care product pollution poses to freshwater ecosystems. Criteria that account for ecological disruption – not just organism death – are needed to protect surface waters, which are under pressure from a growing population and escalating synthetic chemical use. So reports a new study published this week in Elementa.

The presence of artificial sweeteners in rural groundwater shows evidence for contamination by local septic system wastewater, researchers from the University of Waterloo have found.

Solar power will surge globally in the coming decades, but oil demand will also continue to grow, according to a new report from the International Energy Agency.

Germans like to think of themselves as the most environmentally friendly people on earth. They see their sophisticated recycling programs, their love of forests, and, most recently, the country’s drive to replace both nuclear and coal-fired power production with renewable sources — the so-called Energiewende, or “energy turn” — as evidence of their strong environmental consciousness, especially compared to top polluters like the United States and China.

Policymakers at this week’s international climate negotiations in Germany meet amid sobering news that gives their work new urgency. After three years of flat growth, global fossil fuel emissions are rising again, according to a series of reports from the Global Carbon Project, a group chaired by Stanford scientist Rob Jackson.

Songbirds exposed to widely used insecticides during migration pit stops on farmland could lose significant body weight and become disoriented, research by York University and the University of Saskatchewan (U. of S.) has found.

The researchers exposed white-crowned sparrows on spring migration to realistic doses of two different insecticides – imidacloprid, a neonicotinoid, and chlorpyrifos, an organophosphate – to see the effects on migratory activity, orientation and body mass.

Exposure to air pollution is associated with osteoporosis-related loss of bone mineral density and risk of bone fractures, according to a new study by researchers at Columbia University’s Mailman School of Public Health. Their findings are published in The Lancet Planetary Health.