The first step to take in order to help reduce pollution is option C. Maintain a clean, healthy home as an example for others to follow. Change should start with yourself. In order to promote cleanliness and to reduce pollution, you should start it with yourself before encouraging others to do so. In that way, people would also be motivated and inspired to change and improve their ways.
Hold two fingers to beneath the jaw line then count how many beats in 6 (eg) seconds the multiply by 10 (eg) so you get the number of beats in one minute
I would say it's the answer with nitrogen oxides and volatile organic compounds
