Why lockdown had little to no effect on global temperatures

Countries across the world took unprecedented action in the first few months of 2020 to control the spread of COVID-19. At its peak, one-third of the world's population was in lockdown. Around the world, car travel fell by ...

Urban greenways can reduce neighborhood carbon emissions

Greenways are great for cyclists and strollers, runners and walkers, but do they really reduce carbon emissions, as city planners hope? A new study provides some of the first direct proof that they do.

Shared autonomous vehicles have uncertain effects

The next revolution in transportation is expected to be shared autonomous vehicles, with personal cars yielding to driverless cars summoned on demand. For instance, Uber passengers in San Francisco, Pittsburgh and Phoenix ...

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