Castro in Iowa

Castro was also asked about his thoughts on climate change by a 9-year-old girl in the crowd.

Speaking about how it’s a false choice that Americans have to choose between jobs and taking care of the environment, Castro related his experience to his time as mayor of San Antonio.

“I sat on the local utilities board…and we moved away from our coal-fired plants and invested in renewable energy, and I’m proud of that,” Castro said. “We need to do that as a country.”