In one sentence, describe what the following article is about:

Pigeons are natural scavengers who thrive off the waste that humans leave behind.  If you maintain a clean property, free of food scraps and loose fruit and vegetation, you are decreasing the chance that pigeons will roost by your home or apartment building. While this may not prevent the pigeons from occasionally traveling through, they probably won't be sticking around long. Make sure you have trash cans and/or dumpsters that can close. This will keep pigeons and other pests away. Place fence or netting around the areas where pigeons roost.   Placing these types or netting and wire around the ledges and perches of your property will effectively encourage pigeons to set up shop elsewhere. Before they set up residence, you can cover ledges and other roosting spots with sheet metal. Set this at an angle as it will be difficult for pigeons to roost on a slope. You can also prevent pigeons from roosting with bird netting. This will keep pigeons at bay without harming them. Place bird netting around trees and barn rafters. These are rows of small spikes that prevent pigeons from congregating and roosting.   These strips of spikes. are placed around the perimeter of large buildings. They are spaced out specifically to prevent pigeons from resting and roosting on roofs and fences. These are relatively inexpensive and humane. These are essentially the equivalent of scarecrows, but designed for pigeons.   These come in many different forms, from fake owls to flying model hawks. Pigeons may get used to a model owl sitting in one place for a long period of time. The most effective kind are model hawks attached to a kite with streamers. These will move in the wind and trick pigeons into thinking a predator is near.

Summary:
Keep your property clean. Kick them out of their roosting sites. Buy "bird strips" for your house. Use a "scare pigeon".