Just as there are reasons we grab a fast-food meal instead of making lentil soup or a vegetable stir-fry, there are reasons we jump into the car instead of using public transport. Every life choice requires us to balance a variety of demands, desires, and practical limitations. That’s why those of us promoting change need to lower the barriers to entry. We shouldn’t talk as if we require total conversion to the cause, but make it clear that we welcome and appreciate everything that’s done to reduce carbon emissions, for example. Here’s one of my favorite tools, Hop Stop, a website that helps plan trips using public transportation in major cities. It’s a great example of how technology can be used to lower the price of admission to the green cause.