Question

How can we check the level of pollution by industries?​

Answer 1

Answer:

Passive Monitoring. Diffusion tubes absorb a specific pollutant from the ambient air - no power supply is needed. ...

Active (Semi Automatic) Sampling. An analyser pulls the ambient air through a filter for a set period of time e.g one filter per day. ...

Automatic point monitoring.

Answer 2

Answer ♡

• Passive Monitoring. Diffusion tubes absorb a specific pollutant from the ambient air - no power supply is needed.
• Active (Semi Automatic) Sampling. An analyser pulls the ambient air through a filter for a set period of time e.g one filter per day.
• Automatic point monitoring.