Mexico City has a massive trash problem that's partially caused by citizens' resistance to recycle. To encourage them to do so, the city gives residents food vouchers in exchange for their recyclable waste.

In an effort to reduce HIV rates that were approaching development-world levels, a government-run facility in the Canadian city welcomes people to use illegal substances under the supervision of medical professionals.

Experts are worried that disparate privacy rules between the two could pose a threat to future growth.

The United States isn't the only place where local marijuana policies clash with national laws. Even Amsterdam and the Dutch government have struggled with this tension. Read the rest of Governing's first-ever International Issue here.

The United Kingdom is giving unprecedented authority to its cities under a program that the United States could learn a thing or two from.