When Washington died, the phrase which spread the country was: "First in war, first in peace, first in the hearts of his countrymen." While this may be almost universally true today, it was not when the man held office.
More and more certifications show up each year pushing their green credentials. As a result and it is harder and harder to know which ones are actually credible. An empty mailbox with no catalogs or tricky labels is the only true green path.
Understanding the "life-cycle" of any consumable good offers a fairly accurate sense of how "green" it really is -- basically, where things come from and what happens to them when we are done with them.