Every year seven million people die from air pollution. It's the world's biggest environmental killer.
Italy is Europe's most polluted country: in 2012, more than 84,000 people in the country died prematurely owing to bad air quality.
Iceland is the first country in the world to generate 100 percent of its electricity needs from renewable sources, and is taking steps to cut its emissions even further.
earthrise travelled to both countries to meet the engineers and scientists who are developing new technologies designed to clean up the air.
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