Air pollution index Stock Image
by sacatani
Description
Air pollution index in a roadsign - many uses in environment and pollution control.
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Keywords
- pollution
- pollution index
- index
- road
- sign
- road sign
- control
- pollutant
- carbon dioxide
- carbon monoxide
- milligram
- sulfur dioxide
- sulfur
- particles
- contaminants
- warning
- air
- clean air
- measure
- measurement
- regulation
- regulate
- emission
- carbon
- oxygen
- pollute
- smoke
- belching
- dirty
- contamination
- dust
- environment
- healthy
- fresh