it's possible the browning protects against in secretaseci.ore we affect our genetic changes, i don't want our whole food supply affected. i don't know about you, i like that our apples brown. i don't want this. i want food the way it was meant to be. >> at certain times it's good. >> this is a big debate. there is certainly no real answer here. for example when it came to vitamin a rice. >> what? >> they made rice with a lot of vitamin a in it. in certain countries with no minerals or nutrition, in poor countries this can work really well and increase 17% the size of crops and billions of dollars in industry. certain things work. here, given the i diabetes and obesity we have, or it too sugar that gets in our system? >> we can modify food to make it more insect resistant. that's a good thing. then the crops are less perishable. in this case we're doing it on this aesthetic sense, we want our salmon more orange looking? >> i don't want our salmon to be more orange looking, the way it swims originally. apples that don't turn brown, i wouldn't w