Land use. See past others issues:
Land use is a big thing. Be creative and make millions!
This guy here in central Florida made a really inspiring deal. A big piece of land was up for sale on a really good location. It was about an acre big on a well thought after address. All the land around it had been developed with upper class neighbourhoods and the margins for building something new here would be great!
But there was a problem. The land had been used as a dump. Back in the day they called it landfill. What it means is that they just dug out a big hole and filled it with garbage. As a result, there were major settlement issues and heavy regulations against it so now people will probably ever live on this piece of land.