One of the biggest problems for most of the countries in the world is they don't know where to put their trash. Landfills have already hit a maximum in most places.
It may sound a bit odd, but Sweden is forced to import 80,000 tons of trash a year from other countries, such as Norway, because they are in need of trash. Sounds crazy, but it is true. Other countries actually pay them to take their trash. They use trash to produce heating and electricity.
I am surprised more countries are not using this model.