Enjoy your cheeseburgers and steaks when you fire up the grill this Fourth of July weekend, because they may not be available much longer. That's because the climate fanatics have declared war on livestock. Turns out the biggest planet killers are apparently cows. That's the only logical takeaway from a recent CNN headline that informs us that the "World's first carbon tax on livestock will cost farmers $100 per cow." I don't usually pay too much attention to looney-tune ideas from across the Atlantic, but this is the kind of craziness that migrates across the ocean to these shores. "Maybe ...