Say no to moo

CAFO cattle: Your cheeseburgers and steaks. Image from EPA.gov

This is why I'm not eating beef anymore:
The Hummer equivalent in food
"Simply switching from steak to salad could cut as much carbon as leaving the car at home a couple days a week."
(Don't worry, it's not graphic or anything. Just an article.)

Say "No" to other large mammals in your meals, as well, because they:

• take up a LOT of space, and eat a LOT of food (rainforests are destroyed to make room for them)
• create a LOT of waste (incredibly, more than people! well, if you've ever seen a cow patty... it's somewhat bigger than the average human poop)
• are often forced to consume or receive food, antibiotics, and hormones that are inappropriate for them (especially cows and pigs) -- which ends up in YOUR body when you eat them
• Do a google search for pictures from a CAFO, or "concentrated animal feeding operation", where is where your meat comes from (unless you specifically buy the rare kind labeled as not from a CAFO). You may feel differently about food choices after that. In addition, visit NoCAFOS.org to see the damage CAFO's do to surrounding towns, communities, and wildlife.
  
• Large mammals such as cows and pigs are significantly more intelligent and receptive to pain and confinement than, say, a salmon.

Which isn't to say we should go around abusing salmon. But on an environmental and moral scale, if you want to eat animals, the smaller, non-mammalian animals are the way to go. Not just for you, but for the planet! (Oh, that thing we live on.)