30 markers meant how effective are like policies, such as subsidies, taxation and national road charging to correct market failure associated with the use of vehicles, e.g. emissions, pollution, inequality??????????????
20 marker was ****!
10 markers meant smth like how rising fuel prices contribute to inflation above target?? Maybe like, greater prices, such as imposition on trucs and diesel would increase their costs and hence passed on at higher prices to consumers??
Supply side policies are the government measures to affect efficiency and productivity of labour, e.g. diesel cheaper to trucks??
Fiscal are the general taxation and how it affect demand??
Why trucs are negative externalities? Because they are still vehicles. Therefore, thus mean that they produce congestion and great amount of emission, especially particulates, hence affecting health and environment?