Question $3(29)$

$3\mathrm{.}1$ Critically evaluate the environmental and human health risks associated with improper disposal of hazardous waste in illegal sites or unregulated sites. $(8)$

$3\mathrm{.}2$ What are the two main uses of sludge? $(2)$

$3\mathrm{.}3$ How does landfill differ from recycling as a waste management strategy?

$(4)$

$3\mathrm{.}4$ Does noise have an impact on the South African economy? $(1)$

$3\mathrm{.}5$ Give one advantage and disadvantage of landfill and recycling as waste management strategies. $(8)$

$3\mathrm{.}6$ Highlight and explain three economic impacts of air pollution or how South Africa can suffer from air pollution. $(6)$

$$ Note: this is a chemical engineering question in design for environmental sustainability