Cities around the world have made efforts to limit smog by reducing the emissions of

Cities around the world have made efforts to limit smog by reducing the emissions of VOCs. VOC stands for volatile organic compounds. These are terrible for the environment and the air we breathe. They pollute the air pretty heavily so to lesson that for the cities, states and world, there has been efforts to lesson these. 

Explanation:

GFXKTSE5ITRDYCGJ CDTU7CGH,YFHC,GJV.HUXFH,C GJDLURXF,