Heathrow expansion would not break European pollution law, study finds

London's Heathrow airport could build a third runway without breaking European pollution laws, according to research published before a British government decision on airport expansion, the BBC reported on Thursday. Europe's busiest airport is battling Gatwick, London's number two airport, for government approval to build an extra runway, with a final decision due in the next few weeks after more than two decades of deliberations due to local protests about noise and pollution. Heathrow, Britain