See Candidate Page Julián Castro, Climate Castro at CNN Climate Town Hall 9/4/19 Julián Castro wants to set aside half of US land for biodiversity — but where would that land come from? #ClimateTownHall https://t.co/OCBpBk3ZpE pic.twitter.com/ZDwPsP7BF8— CNN Politics (@CNNPolitics) September 4, 2019