Here's Marc Gunther, parodying what it means to be an environmentalist:
PepsiCo (PEP) buys lots of renewable energy, while a Coca Cola (KO) plant recycles plastic bottles. Should environmentalists drink Pepsi or Coke? Dell (DELL) is "carbon neutral." Hewlett Packard (HPQ) says it designs for the environment. Whose laptops are more "green"? So many choices, so little reliable guidance: Clorox GreenWorks or Seventh Generation? Local or organic strawberries? Paper or plastic? Who's to say? Wal-Mart (WMT), that's who.Wait a second, you mean he's serious!!! The planet is doomed. Suppose Pepsi is twice as environmentally-friendly (whatever that means) as Coke. However, if you drink twice as much Pepsi as you would Coke because you like it more, then then the whole sustainability index that Walmart is marketing (and I use that last word quite deliberately) is completely meaningless. Why is that so hard to understand?