always be green. >> eat local. the latest food trend. if you buy food that doesn't have to travel far to get to you, it's better for the environment. it tastes better. it's better for you. and it supports local merchants. >> is it good to eat l locally?t >> local, g yeah. you should support small businesses. >> local isca fresher, more nutrients. you're encouraging local jobs. >> 100-mile radius. i think it's really cool. >> really cool. and the benefits seem logical.o. local food must be greener because it doesn't travel as b far. but pierre, author of a book says we have it all wrong. s if you want to help the planet, eat globally. what do you mean? >> i mean that not so long ago we used to consume mostly local food and then the steam ships came along, the railroad came along and food naturally migrated out of cities and in locations where they were better suited to the local environment.