No rest for polluters. By 2020, the European Commission requires the Twenty-Five to intensify the fight against air pollution. Imposed goal: reduce 40% premature deaths due to fine particles and ozone. Cost of effort: 7,1 billion per year, but the gain in health spending would be five times larger!
Note: 7,1 billion (! Huge amount) and still nothing for the injection of water ... Yet in pollution results are impressive: a real research program on the subject could be very effective!