Before supermarkets, most food eaten in the UK was local and seasonal.
Today exotic fruits and vegetables are available year-round.
Food that can be grown locally is still imported.
In 2013, 47% of the UK food supply was imported.

This means that what was once food for the local population in low-income countries is instead used for high-value exports to the UK.
Less land becomes available in poorer countries for locals to grow their own food.
High-value crops often need a lot of water to grow, this puts extra pressure on an already limited water supply.
Though jobs are created, they are mostly poorly paid and people can become exposed to harmful chemicals when working.
Taxes paid to the government can help to build schools and hospitals.