Magnetic leaves reveal Bellingham's most polluted byways

Tree leaves may be powerful tools for monitoring air quality and planning biking routes and walking paths, suggests a new study by scientists at Western Washington University in Bellingham. The research will be presented ...

Latest sandstorm brings Iraq to standstill

Another sandstorm that descended Monday on Iraq sent at least 2,000 people to hospital with breathing problems and led to the closure of airports, schools and public offices across the country.

WHO says air pollution kills 7 mn a year, toughens guidelines

The World Health Organization strengthened its air quality guidelines on Wednesday, saying air pollution was now one of the biggest environmental threats to human health, causing seven million premature deaths a year.

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