Class 4 have been investigating how air pollution can be dangerous, especially near busy roads. Air pollution is made up of all the dangerous particles (bits) that shouldn’t be there.

We tested water from near a bust road and also from a country park.

We added a special chemical to check for pollution and we discovered that the water near the road was much more polluted that the water from the park.

The dark liquid indicates that there are impurities in the water.