john liu on solutions from china, ethiopia and rwanda. coming up on "earth focus." [drumming] >> this is china's loess plateau. until recently, this was one of the poorest regions in the country. a land renowned for floods, mudslides and famine. but with the fanfare comes the hope of change for the better. my name is john d. liu. i've been documenting the changes on the plateau for 15 years. i first came here in 1995 to film an ambitious project where local people were constructing a new landscape on a vast scale. transforming a barren land into a green and fertile one. the project certainly changed my life, convincing me to become a soil scientist. the lessons i've learned in the last few years have made me realize that many of the human tragedies that we regularly witness around the world, the floods, mudslides, droughts and famines, are not inevitable. here on the loess plateau i've witnessed that people can lift themselves out of poverty. they can radically improve their environment. and by doing so, reduce the threat of climate change. >> [singing] >> when i fi

we will talk about that, tu, john liu. n, during the break we were talking comptroller or controller. david walker said controller. >> no, it's comptroller. >> i just read a piece, he says it's controller. it was a mistake made 500 years ago. it's supposed to be controller. what is it? . >> it says comptroller. >> what will be the next one, eliot spitzer, what does he say it will be? . >> you have to ask him about that. i'm proud of the fiscal year ending june 30th. thanks for giving us the shoutout on that. >> i want to talk to the results and get to elliot spitz fer i could and the mayoral race. on the results, what is the breakdown between the upon you have with hedge funds, with private equity, in reits and real estate and the fees you are paying for that. >> well the breakdown is, we have between 60 to 70% of equities. another 20% in fixed income. the remainder is split between real estate, private equity and hedge funds. the latter three categories are a relatively small portion of our portfolio. >> what do you need t

the city could make john liu its first mayor. thompson ran for mayor he was fighting a big money battle against billionaire michael bloomberg. bloomberg outspent thompson 10-1. this time christine quinn is leading the pack in the polls. she's grabbed several union endorsements and the weiner scandal could force a runoff election. quinn's campaign is getting national exposure because of the weiner scandal, but she's having to explain her controversial position taken on the stop and frisk policy. >> you have raised constitutional questions about stop and frisk and yet you still support it. why? >> i think stop and frisk can be used in a way that keeps us safe. when i'm mayor, you'll see the number of stops go down. we'll be focused on quality stops that keep us safe and that are done in a constitutional way not just a rash to stop everyone. >> one of quinn's top political rivals joins us tonight. democrat bill thompson running for mayor of the city of new york who barely lost to michael bloomberg four years ago. let's talk about th

de blasio at 17% and bill thompson at 15% and the city controller john liu at 7%.th you. full disclosure here. you worked on hillary clinton's staff and you worked and just want to make sure and i think anthony weiner. >> client of mine several years ago, yes. >> glad we brought you in. he is your former client and you're watching this and what do you think? >> it is very difficult to watch. heartbreaking. listen, i think anthony displays qualities that i think a lot of people have responded to and said we would like him to be mayor because whether you have paid attention to his policy, you see him being a fighter and you've seen that on the floor of the house. but i think what's happening with who and now and people are being of two minds. on the one hand, respect her for coming out in the way that she did because she's such an extraordinarily private person and a lot of us who worked with her realize she's so private and for her to come out the way she has, we all sort of respected that. on the other hand, it gets to a point where you look at him and say, why did