See Candidate Page Bill de Blasio, Climate de Blasio tweets 7/30/19 .@BernieSanders is right: Big challenges require big ideas — and climate change is the existential threat of our time.In New York City, we're showing what a #GreenNewDeal looks like in practice. #DemDebate https://t.co/Kz6rpba7bE— Bill de Blasio (@BilldeBlasio) July 31, 2019