Science Nugget: 9⚛

Flying is the most efficient way to travel long distances, but the environmental impact of doing so is substantial. A round-trip coast-to-coast flight across the U.S. emits two tons of carbon dioxide per passenger, which is about 30% of a typical American household’s annual electricity use. Conversely, bicycling produces almost no carbon footprint outside of the resources needed to build the bicycle and provide food energy for the rider. Cycling across the country would take a while, though.


‘Wait! So is this a hypothesis, a theory, or a fact?’

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