A Monsanto Exec Takes On the GMO Debate Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Monsanto tomato breeder Alan Krivanek checks on tomato plants he's breeding in a Monsanto greenhouse. ( Max Whittaker/Prime for The Washington Post / Getty ) Produced by Jillian Weinberger, Angus Chen and Arwa Gunja Produced by PRI and WNYC