Ground-level ozone is a major air pollutant that shortens human lives and kills thousands each year, resulting in major economic impacts. It is formed when methane, nitrogen oxides and volatile organic compounds (released from vehicles, industry, power plants and crops) react in the presence of sunlight.
Although the country treats 67 per cent of its wastewater, it needs to invest in infrastructure maintenance to reduce costs in the long-term, finds a joint report by Economist Impact and Nippon Foundation.