Sentences with phrase «means air quality control»
CAT's approach to biochar is definitely on the low tech side - and looking at the smoke that is coming out of those kilns, that means air quality control is not quite what it could be.
https://www.treehugger.com/ Not exact matches
This also means that Midwestern state governors and their respective US Congressional delegations need to take seriously the recent changes to national ambient air quality standards and pollution control standards for refineries.