thousands of people hurt by extreme poverty, potentially undermrmining thehe health in humans. but it does not have to be like this. where a few areas mamanagement couldd get rid of rimp farms. the e difference is striking. language][foforeign >> the message from thee community protected b by shrimp farming is clear. >> [speaking foreign lananguage] ♪ >> the cost of food across the world was on the rise and many have blamed the price hikes. food speculation for the global finance market. ecologists travel to mexico, the birthplace -- birthplace of corn, to find out more about these effects that were being felt across mexican society. in the mountains in southern mexico, coffee production fuelled the economy. these rural communities and not self-sufficient on food, making them vulnerable to sudden crises. >> [speaking foreign language] >> lorenzo and his wife look after their grandchildren during the day, while the rest of their famimily worked in the fifields. >> [speaking foreign language] >> fooood price volatilitity ons scalale has been linked directly to speculatition. >> s