Sentences with phrase «bad quality coal»

Not exact matches

In Los Angeles, air quality, particularly from traffic, is one of the worst, but other areas have different problems — coal - fired power plants, chemical factories, contaminated water, hazardous waste.

Relying on low quality coal «is a bad thing,» Guan says.

With China dealing with civil unrest and bad international headlines over air quality issues, the country recently penned a joint greenhouse gas reduction agreement with the United States and also announced in September that it would soon ban the import of coal with high sulfur and ash content.

In the second study, for the next 20 years, even if, worst - case, we still use lots of coal, nationwide air quality for other emissions will also improve.