Transportation produces about a quarter of the world’s greenhouse gas emissions, and passenger vehicles account for over half that figure. As such, nearly every plan for future emissions cuts includes some variant of getting people out of internal-combustion vehicles—typically into electric versions of the same vehicle. But a couple of countries have managed an alternate route to lower emissions: Denmark and the Netherlands both have bicycle-focused transportation that gets many people out of cars entirely.
An international team of researchers decided to look into what factors have enabled these countries to make that shift and what might happen if more countries adopted a similar transportation focus. Two conclusions are clear:
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