You can't rely on the main-stream media to cover anything about the Catholic Church accurately. Recently, according to our secular gumshoes, "the Vatican" "announced" a "new" list of "seven deadly sins". Now, you're going to hell for using plastic bags.
One person published an article talking about sin in relation to contemporary issues, including the environment. Not Pope Benedict, not "the Vatican", not an official from the Vatican.
Sin is not sin because dudes in Rome say so. Sin is sin because it is contrary to God's will for us, and that is not subject to the decrees of man.
More at What Does the Prayer Really Say? and the Deacon's Bench.