Help students gain a better awareness
of environmental conditions in their area
and in the world at large. How Clean
Is the Water? tests for the presence
of phosphates, pH, chlorides and
lead. Experiments in How Clean Is the
Air? include dust particle monitoring,
deterioration of nylon, fabric fading due
to oxides of nitrogen, and dissolving
pollutants in rain water. Both kits include
an instruction guide.v