A fish farm in a sea loch raises salmon and sells them to supermarkets. Waste from the farm's pens spreads into the surrounding water, which local fishing boats also work.
Which effect is a negative externality of the farm's salmon production?
A fine the fish farm pays for letting waste into the loch
The price supermarkets pay the fish farm for its salmon
Smaller catches for the local fishing boats working the loch
The cost of the feed the fish farm buys for its salmon
127 exam-style questions on OCR GCSE Economics 3.8 Limitations of markets, covering 3.8.1 Positive and negative externalities, 3.8.2 Policies to correct externalities, 3.8.3 Impact of externality policies, and 3.8.4 Costs and benefits of externality policies. Each one has a worked solution and a mark scheme showing where the marks go.