As you could probably guess, the darkest red is the highest density of factory farms, and is based on data from 2007 (the newest available). Above are all the different kinds of factory farms together; scroll down for individual farm types. All images: Factory Farm Map
A couple days ago Rachel reported on how factory farms have grown 20% in size since just 2005. That was based on data from Factory Farm Map, and is shocking enough in its expository form, but if that stat didn't grab you perhaps the maps themselves will. On their site there's lots of interactivity in them--you've got the ability to search by state and highlight just cattle farms, chickens, pigs, etc--but even the static images have some serious impact:Here's where the US' factory cattle farms are:
Here's a sample of the sort of detail you can get on a state and county level. The small blue dots are meat processing plants:
View all the maps in their interactive glory: Factory Farm Map
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More on Factory Farming:
Factory Farms Decreasing in Number, But Increasing in Size: 20 Percent Growth in 5 Years
Hidden Webcam Exposes Chicken Cruelty 24 Hours a Day
Touting Factory Pig Farming Safe, Really?
So What Does the Inside of a Factory Farm Look Like Anyway?