listening skill: feture food

http://www.youtube.com/watch?v=YvLBMXC_D0Q
It is talk about the food in the old genaration. How could they grow the food, and how could they find the new technology to study the gene revolution. 12,000 years ago, human being began to grow food, build factories, and the main food at that time were potatos. However, pople had to study how to improved the qulity of the food, for they met a big disease at that time in 1847. It made 1 million people died. Moreover, people who were exports of food at that time focus on the gene revolution of food. People also surprised that the Green revolution would become Gene revolution. They tried to put organize a new gene into the egg, animals, even though human genes and human body. Everything has changed of food nowdays.
Opinion:
Though i couldn't image that people in the old genaration could try many way to improve the quality of their food, some busineseman did it. They produced some food which were health at that time. People knew they should get the healthy food and exports tried to get some imformation to let the food up to the high level. Futhermore, people still try some ways to find the most healthy things of food for people. Company and factories also try to make the health food for customs. In my opinion, I prefer the natural food which are no additive. I believe the natural food can give human the most health things we need.