See Candidate Page Joe Biden, Climate Biden tweets 9/9/19 Young Americans are especially worried about climate change and know it is not just a domestic priority — it's a foreign policy one. I agree. And I'm ready to tackle this on day one. https://t.co/evUnnqUCoS pic.twitter.com/vMgLVZlv5R— Joe Biden (@JoeBiden) September 9, 2019