Which one of the following is most likely to result in an increase in greenhouse gas emissions from the aviation sector?
Mandating a strictly enforced cap on passenger carbon emissions per flight-mile.
Accelerating the retirement of older, less fuel-efficient commercial jet aircraft.
Subsidising high-speed rail travel to encourage substitution away from domestic flights.
Abolishing the air passenger departure tax on long-haul flights.
22 exam-style questions on Edexcel A A Level Economics 1.2.9 Indirect taxes and subsidies. Each one has a worked solution and a mark scheme showing where the marks go.