In many countries, especially developing countries, where there are problems with air pollution - the air pollution problem in China, for example, is very well known - there will be the collateral benefit of improving air quality.
Monissa maissa ja etenkin kehitysmaissa, joissa ilmansaasteet ovat ongelma (esimerkiksi Kiinassa, jonka ilmansaasteongelma on hyvin tiedossa), ilmanlaadun parantamisen oheishyödyt ovat tosiasia.