Clear Standards is out with Carbon Tracker, a free GPS-enabled carbon footprint application for the iPhone.
With the app installed, users can easily calculate the carbon footprint from daily commuting, vacations, or business trips. iPhone 3G’s built-in GPS is used to determine the approximate distance of each trip segment, and users can also set monthly “maximum emission” goals and monitor their progress against defined targets.
Other features of Carbon Tracker include the ability to select preferred units of measurement for distance and amount of carbon emissions. Transportation emission factors are based on averages from tools developed by the World Resources Institute…