I finished my very guilty pleasure, a Diet Coke, on the Boston-bound train platform this afternoon and suddenly, I was saddled with an empty aluminum can and nothing but garbage bins for disposal. For convenience sake, I could have dropped it off. It's just one can after all. But I couldn't shake the thought of it sitting in a dump for at least the next 80 years. Instead, I tucked it into my purse for the day until I found a recycling bin (it ended up being the one in my kitchen).We face small choices like that one every day: take the easy road, or accept a minor inconvenience for the betterment of something bigger than ourselves. What's an afternoon in my purse compared to a lifetime in a landfill?