Comment of the assessor :-

1) Do some level meter to determine the air pollution level.

2) Do some research if there are some air humidity that can been disrupted my collection of result.

3) Add some more features to the project to make it can be used by the authorities to see the air pollution in the city.

After all the comment, I have discuss to with my lecturer to upgrading my project so we have been agreed to add some features which is we put some level meter on the project to see the level of air pollution in the city. We also agreed to use MQ135 sensor as electrochemical sensor that can triggered some gas in the city.