globalbriefs
Buzzing RoboBees Tiny Robots Seen as Tech Fix for Reduced Bee Population
Harvard University researchers led by engineer- ing professor Robert Wood have introduced the first RoboBees—bee-sized robots that can ascend and hover in midair while tethered to a power supply. The project is a breakthrough in the field
of micro-aerial vehicles. It has previously been impossible to pack all the components onto
such a tiny workable robot framework and keep it lightweight enough to fly. The researchers believe that within 10 years, RoboBees could artificially pollinate a field of crops, a critical development if the commercial pollination industry cannot recover from the severe bee losses of the past decade.
Source: Science
Tuna Turnaround Lower Mercury Levels Tied to Drop in Coal Emissions
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Levels of highly toxic mercury contamination in Atlantic bluefin tuna are rapidly declining, a trend that has been linked to reduced mercury emissions in North America, according to a new study published in Environmental Science & Technol- ogy. Average mercury concentrations dropped by more than 2 percent per year, for a total decline of 19 percent between 2004 and 2012. Scientists believe that most of that reduction has occurred because of a shift
away from coal, the major source of mercury emissions, to natural gas and renew- able fuels. Pollution control requirements imposed by the federal government have also cut mercury emissions, but these have been rolled back or eliminated by President Trump’s commitment to “bring back coal.”
Source: Scientific American
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