system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What are the pros and cons of the UK leaving the European Union?
gpt
Pros of leaving: They will better be able to control their borders. They will no longer be paying dues to the EU. They will be able to set more tariffs on imported goods. 

Cons of leaving: Their citizenry will no longer be able to freely travel around Europe and so would need to get tourist visas. Their citizenry would not be able to work in other EU countries without getting work visas or fully immigrating to those countries. They may have fewer international students studying at university. Their exports can have tariffs placed on them by EU nations. They may get fewer tourists as EU tourists will have to get tourist visas.