California Gov. Gavin Newsom speaks at a press conference on Wednesday, Sept. 23, 2020, at Cal Expo in Sacramento where he announced an executive order requiring the sale of all new passenger vehicles to be zero-emission by 2035, a move the governor says would achieve a significant reduction in greenhouse gas emissions. California would be the first state with such a rule, though Germany and France are among 15 other countries that have a similar requirement. (Daniel Kim/The Sacramento Bee via AP, Pool)

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A crowd of people in bikes pedals through a wide brick plaza. In the center, wearing a black helmet and blue hoodie, is Boston Mayor Michelle Wu.

PHOTOS: Boston’s 2023 Bike To Work Day

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Between 7:30 and 8:45 a.m., convoys of riders coming in from Mattapan, Dorchester, Brookline, Cambridge, Malden, Chelsea, and other cities across the region arrived in City Hall Plaza in waves, while City of Boston Transportation Department staff welcomed them with cowbells and cheers.