(a) Burning (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming in power stations or in transport systems, whether gas, oil or coal, produces huge quantities of (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming gas which is considered to cause (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming.
(b) If a fossil fuel contains sulfur, on combustion the fuel the sulfur burns to form (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming.

(c) The pollutants (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming and particulate (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming are formed from the incomplete burning of a fuel. The gas carbon monoxide is highly (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming and particles of carbon makes surfaces (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming.

(d) Nitrogen oxides are formed from the reaction between atmospheric (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming and (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming at the high temperatures inside e.g. car engines.

(e) Given the following six molecular structures ...
(i) O=C=O, (ii) O=S=O, (iii) N=O, (iv) H-O-H, (v) C=O and (vi) O=N=O

carbon monoxide CO is molecule (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming and formed in the (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming combustion of fossil fuels e.g. (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming car engines.

water H₂O is molecule (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming and the second biggest product of fossil fuel combustion.

nitrogen dioxide, NO₂ is molecule (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming and is formed in the atmosphere by the oxidation of molecule (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming. and dissolves and reacts with water to cause (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming.

carbon dioxide CO₂ is molecule (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming, it dissolves in rain water or sea water and can make the oceans too (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming but is used by plants in (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming.

sulfur dioxide SO₂ is molecule (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming and reacts with oxygen (from air) in water to also cause (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming which can make lakes and rivers becoming too acid harming wildlife.

nitrogen monoxide NO is molecule (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming and formed in (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming combustion situations and is (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming to molecule (i)(ii)(iii)(iv)(v)(vi)acidacidiccarbondioxidedirtyfossilfuelsglobalhighincompleteinefficientmonoxidenitrogenoxidisedoxygenphotosynthesisrainsulfurtemperaturetoxicwarming by reaction with oxygen in the atmosphere.