Elimination/Reduction of Beef in your diet remains among the most potent personal choices you can make to help preserve our natural world
Hamburgers are the Hummers of Food in Global Warming: Scientists – CommonDreams.org
Buying local meat and produce will not have nearly the same effect, he cautioned.
That’s because only five percent of the emissions related to food come from transporting food to market.
“You can have a much bigger impact by shifting just one day a week from meat and dairy to anything else than going local every day of the year,” Weber said.
The facts : Livestock production …
- is the largest land use in the western United States
- Ranching in the West is the principle source of conflict resulting in tax-payer dollars spent to kill wolves, buffalo, coyotes, prairie dogs, and other wildlife 
- is the most significant cause of non-point source water pollution 
- is the most prominent factor resulting in wildlife imperilment/loss of biodiversity/listed species in the West 
- is the most robust contributor to desertification of landscapes in North America 
Contrary to popular belief, grass-fed beef is worse for the atmosphere than corn/grain fed beef:
Many environmentalists have argued that finishing up the fattening of beef cattle on corn is worse for the environment than cattle that are raised solely on pasture grass. Pelletier says his team’s analysis finds that at least from a climate perspective, the opposite is true. “We do see significant differences in the GHG intensities [of grass vs grain finishing]. It’s roughly on the order of 50 percent higher in grass-finished systems.”
And their emission is just part of the story – when allowed to function properly our public lands serve as carbon sinks …
 War on Wildlife: The U.S. Department of Agriculture’s “Wildlife Services” – A Report to President Barack Obama and Congress. Wendy Keefover-Ring, WildEarth Guardians (February 2009). Download (108-page pdf)
 Preliminary Summary of Findings: Western States Water Council’s Nonpoint Source Pollution Survey I-B-2, in Nonpoint Source Pollution Control Workshop — Technical Issues (July 25-28, 1989).
 (a) Sierra Club Grazing Committee :
In the United States, livestock grazing has contributed to the listing of 22 percent of federal threatened and endangered species—almost equal to logging (12 percent) and mining (11 percent) combined. No other human activity in the West is as responsible for the decline or loss of species as is livestock production.
(b) Curtis H Flather, Linda A Joyce, & Carol A Bloomgarden, Species Endangerment Patterns in the United States, Gen. Tech. Rep. RM-241 22-23 (1994)
(c) R.D. Ohmart & B.W. Anderson, Riparian Habitat, in Inventory and Monitoring Wildlife Habitat 169-99, (B.S. Cooperrider ed. 1986)
 (a) Desertification Alters Regional Ecosystem Climate Interactions (Jan. 18, 2005)
(b) David Sheridan, Desertification of the United States 121 (1981)