1) The high temperature inside a car engine causes a reaction between nitrogen and oxygen to form oxides of nitrogen.
(a) Explain why the reaction between nitrogen and oxygen only takes place at high temperatures. 
The reaction between nitrogen and oxygen only takes place at high temperatures because it requires input into it.
(b) The emission of nitrogen oxides from car exhausts can be reduced by using a catalytic converter.
(i) State one metal used as a catalyst in a catalytic converter. 
(ii) Give an equation to show how nitrogen monoxide, NO, reacts in a catalytic converter. 
2CO(g) + 2NO(g) -> N2(g) + 2CO2(g)
(iii) State and explain one other method that can be used to reduce NOx emissions from a car engine. 
Fuel Reburning (FR)
Low NOx Burners (LNB)
Selective Catalytic Reduction (SCR)
Selective Non-Catalytic Reduction
TED talk on air pollution..
title: ‘does the world need nuclear energy?’