Starting with the phrase 'high sea temperatures' use your knowledge and this diagram to explain the formation of a cyclone

High sea temperatures causes warm air from convection currents to rise, simultaneously causing a build up of energy and low pressure. This energy results in the powerful kinetic energy within a cyclone (with the help of latent heat.) The Coriolis effect then causes the cyclone to spin, as it is also the most energy stabilized way of movement

Temperate inversion

(i) where are strategies for reducing traffic emissions likely to be more effective - in developed world cities like los angeles or in developing world cities like Cairo and beijing?

Probably in developing countries like Beijing and Cairo, because they tend to emit the most greenhouse gases. Also, they may be more willing to 'go green' if they know it will save them money, unlike areas like los Angeles. 

(ii) state two reasons why atmospheric pollution are worse in places with a dry and hot climate

-In hot climates, the warm, less dense air mass moves over a dense, cold air mass. As a result, warm inversion layer then acts  stops atmospheric mixing, and traps the pollution
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