See Candidate Page Julián Castro, Climate Castro tweets 12/11/19 Congratulations @GretaThunberg! Without serious, sustained efforts to combat climate change, our planet will continue to face disastrous consequences.Greta answered the call that generations before her have ignored, and refused to accept no for an answer. https://t.co/sg02Nq5h2C— Julián Castro (@JulianCastro) December 11, 2019