417/1 CEEFAX1 Fri 2 Dec CEEFAX.TV
POLLUTION INDEX: AN EXPLANATION
When air pollution is 1-3 (Low)
Effects are unlikely to be noticed,even
by those sensitive to air pollutants.
When air pollution is 4-5 (Moderate)
Sensitive people may notice mild
effects but unlikely to need action.
When air pollution is 6-7 (High)
Sensitive people may notice significant
effects, and may need action to reduce
or avoid them (for example by spending
less time outdoors).
When air pollution is 8-10 (Very High)
Effects as for High, but symptoms may
be worse, or may affect more people.
Data:BBC Weather Centre/Met Office