Environmental Chemistry

Pollution

• greenhouse gases: CO${}_2,$CH${}_4,$N${}_2$O$,$CFCs$,$O${}_3,$H${}_2$O

• Ozone depletion

  Cl$+$O${}_3\to$ClO$+$O${}_2;$ClO$+$O$\to$Cl$+$O${}_2$
• acid rain pH$<5.6;$BOD$<5$ppm for clean water