Onestion $4(25$ marks$)$

The following statement recently appeared in the news media: "Witbank, $..$ South

Africa has some of the world's most polluted air that's according to new research

reported. The massively high levels of pollution can be directly linked to the national

utility company Eskom and its string of coal fired power stations that run through the

South African province Mpumalanga."

a$)$ Three of the main air pollutants emitted from all coal fired combustion installations

$($such as Eskom power stations$)$: sulphur dioxide, NOx, PM$10.$

i$)$ What is the origin of the sulphur dioxide?

ii$)$ What is 'NOx' and what is the origin $($source$)$ of the $\text{'}$ NOx $\text{'}.$

iii$)$ What is the definition of $\text{'}$PM$10\text{'}$ and what is the source of PM$10?$

iv$)$ What are the health effects of inhalation of sulphur dioxide, NOx, PM$10$ in

ambient air?

b$)$ i$)$ Describe the three main methods of assessing air quality

ii$)$ What are the main objectives of the Air Quality Act $($NEM:AQA, Act $39$ of $2004)$