Sooner or later, anyone living in the US will hear a gun rights advocate say that ‘guns don’t kill people, people do.’ Semantics, but true. While we’re on semantics, strictly speaking, cities are not responsible for GHG emissions. Rather the people, or more specifically, those earning the most money, almost all of whom live in cities, are responsible for the vast majority of the world’s GHG emissions. But that is not nearly as easy to communicate, and messaging is important.
On cities and GHG emissions, what is the message we really need to communicate? First, it’s true, if you add up all the GHG emissions – direct (e.g., out the back end of our car) and indirect (e.g., the trees cut down for pasture or the belches from the cattle used in our hamburgers) – residents of cities are responsible for more than 70% of the world’s GHG emissions (and likely more than 80%). This should not be much of a surprise, as these same people are responsible for more than 80% of the world’s economy. GHG emissions are a by-product of the stuff we buy and do.