Zohran Mamdani will need to enforce the city’s building decarbonization law, enact his green school policy and handle the climate change-related issues residents often face—like flooding and extreme heat.By Lauren DalbanIt was 10 p.m. on election night. Twenty minutes prior, most news organizations had called the New York City mayoral race for state assemblymember Zohran Mamdani, a previously obscure politician who rose to power through an unrelenting campaign for affordability.