See Candidate Page Julián Castro, Climate Castro tweets 9/19/19 Climate change is the greatest threat to our future. But it also gives us tremendous opportunity to create millions of new jobs in a sustainable economy.I'll be talking about it on the @MSNBC #ClimateForum at 5:30 EST, tune in.https://t.co/DRzBsAUuZm— Julián Castro (@JulianCastro) September 19, 2019