LuannMy friend Len sent me this comic. Humorous, isn't it? On a serious note, this comic reminds me of the time my friend and mathematics guru Amanda Serenevy once calculated how many plastic bags could be used as fuel. Based on her calculations, she estimated that it would take 14 plastic bags to power a vehicle for 1 mile. Not bad, right? Another estimate projects that each year, the US allocates 12 million barrels of oil for making plastic bags. Many of my students have expressed surprise when they've recalled that plastic bags are made of oil. Sometimes it's good to be reminded of these things, even if it's from reading a comic.