standing in the parking lot of an enormous shopping mall, staring at a Ford Excursion. A 7,700-pound hunk of metal, the Excursion gets horrible gas mileage, while spewing massive amounts of hydrocarbons into the atmosphere. It's the official policy of our federal government to offer Americans bribes, in the form of huge tax deductions, to encourage the purchase of such vehicles. In 2003, Congress enacted a provision allowing people who bought SUVs weighing at least 6,000 pounds to deduct the entire purchase price from their taxable income, if they claimed to use the things for "business purposes." [snip] You, sir...