4:14 know that, in car engines, the temperature reached is high enough to allow nitrogen and oxygen from air to react, forming oxides of nitrogen
When fuels are burned in vehicle engines, high temperatures are reached.
At these high temperatures nitrogen and oxygen from the air react to produce nitrogen oxides:
One bond in the double bond breaks.
Monomers join together to form a long chain.
Polymer contains only single bonds.
4:47 explain problems in the disposal of addition polymers, including: their inertness and inability to biodegrade, the production of toxic gases when they are burned
Polymers are inert (unreactive) as they have strong C-C bonds.
This makes them non-biodegradeable.
Biodegradable: the breakdown of a substance by microorganisms.