Should you trust that eco tag?

How to know whether that Eco tag is just sticking it to you!
http://www.nowtoronto.com/columns/ecoholic.cfm?content=168989
"Shopping for products that don’t traumatize the planet can leave you feeling like a drugged-out mouse in a maze. Just snap your fingers and another dozen green logos seem to materialize, as companies and retail chains take it upon themselves to invent their own labelling systems. Thanks for the help, guys, but what we really need is a national agreed-upon seal. Here’s a quick rundown of some of the labels you’ll come across. So should you trust ’em? "