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Power electronics, which do things like modify voltages or convert between direct and alternating current, are everywhere. They’re in the power bricks we use to charge our portable devices; they’re in the battery packs of electric cars; and they’re in the power grid itself, where they mediate between high-voltage transmission lines and the lower voltages of household electrical sockets.

An abundant enzyme in marine microbes may be responsible for production of the greenhouse gas.  Industrial and agricultural activities produce large amounts of methane, a greenhouse gas that contributes to global warming. Many bacteria also produce methane as a byproduct of their metabolism. Some of this naturally released methane comes from the ocean, a phenomenon that has long puzzled scientists because there are no known methane-producing organisms living near the ocean’s surface.

Invasive species continue to be a critical threat to freshwater ecosystems in Saskatchewan and across North America.

But the species that have yet to enter Saskatchewan waters might be of greatest concern.

Los hallazgos sugieren que la exposición a la contaminación del aire proveniente del tráfico en Londres durante el embarazo se asocia con un mayor riesgo de bajo peso de bebés nacidos a término. Pero el ruido relacionado con el tráfico parece no tener ningún efecto.

Oxygen levels, dissolved minerals among factors responsible for high concentrations of radium in untreated water from aquifer that underlies six states

U.S. Geological Survey scientists have shed new light on processes that happen deep underground.