narrator: on this episode of "earth foc," avocados have become one of the most popular foods on the planet and exploded into a multibillion-dollar industry. the petorca province in chile is a hub of worldwide avocado production, but the growth of the industry has created a crisis over water rights, raising questions about the moral dimensions of how our avocados are grown and consumed.

different announcer: "earth focus" is made possible in part by a grant from anne ray foundation, a margaret a. cargill philanthropy; the orange county community foundation; and the farvue foundation. [man speaking spanish]

[laughter]

[motor starts]

[indistinct chatter] [singing in spanish]

[thunder]

[music playing] [indistinct chatter]

[mn speaking spanish]

announcer: "earth focus" is made

possible in part by a grant from anne ray foundation, a margaret a. cargill philanthropy; the orange county community foundation; and the farvue foundation. ç ñxñññ@óóñuñut

[mikael colville-andersen] i first came to bangkok in the early 1990's as an impressionable young backpacker. the city fulfilled absolutely every expectation i had about a noisy, crazy, non-stop asian city should be like. absolutely every urban challenge faced by cities around the world is amplified here in bangkok. this country is run by a military dictatorship who's also trying to influence urban development and urban planning. there are very few examples from history where that story has a happy ending. this series is about finding the life-sized pockets of goodness in cities around the world. there's still a refreshing insane madness to this place. outside of the comfort zone of this amazing market lies the urban jungle.