 I'm going to begin with some good news. The good news is that there is a high probability that this century human population growth is going to plateau. It's not certain we have to make difficult decisions over the next couple of decades. Humanity's footprint on the earth could conceivably come to a plateau. There will be more people and those people will not only consume more food, but they will demand and they will rightfully demand more food and better food. I hi, wrth gwrs i chi'n meddwl'r ddiweddau i ddeudio'r system ymysgoreddu. Rhaid, y system ymysgoreddu hynny wedi archwyfodol, niflo wedi eu defnyddio ar maen nhin. Ond ymysgoreddu i siaradau yn gofyn nhw'n meddwl am ddefnyddio ymwneud o'r dweud sydd y dda. Mae hynny'r ddefnyddio ar ddeudio'r system bys yn cael i'r aroedd gan oeddennig ar gweithio'r system. Mae'r clyweddau plannau dda wedi cael i'r awd, i'r dweud i'r ysgriffau. ac mae'r gwaith gwaith yn ymddangos yn llunio'n gweithio. A'i cael ei dynnu i gyd yn ymddangos i'w ddim yn yw'r amser sy'n ddefnyddio y bydd cyflwyno'n gwybodiaeth yn ymddangos. Nid oeddwn ni'n cael ei gweithio'r ysgolwyr lleol, mae'r ysgolwyr wedi yn gwneud yn ei gweithio'r ardal i'r gwahanol yn cyflawni gyda gwylo arni. Felly mor yn gwneud hynny'n gwybod y dyfodol yn y cyflwyno, oedd y dyfodol yn gwneud gan ydwynt, ond rydyn ni wedi'u bywyd yn bwysig. Rydyn ni'n mynd i gael ar dwy ffordd, ac mae'r ffordd yn gwybod. Rydyn ni'n gwybod i fod ymddangos yn ei gwybod, mae'r gwybod gyda'r llan, ac mae'r llan ffordd bwysig yn cyflwyno yn ysgolfur yma yn agriacolol. Mae'r gweithio ar gyfer gyda'r cyflwyno yn y cyflwyno ar y gwaith ymwysig, Wch chi'n gweld, any sensible policy, there is no new land for agriculture. A massive amount can be done by closing the yield gap, by improving education, the human social capital and the infrastructure. An area where China has made extraordinary progress over the last couple of decades. We also have to invest in new knowledge, we have to invest not only in closing the yield gap, but in increasing yields. There is a lot that can be done. Felly, rydyn ni'n dweud ydy'r ffordd yma yn mynd i'w gweithio'n gwneud. A ydych chi'n mynd i'r byw, o'n gweithio'n mynd i'w gweithio newidol, rydych chi'n mynd i'n gweithio'n gweithio'r ffordd agriacolwyr ychydig ond rydych chi'n mynd i'n gyffredinig gyrwyr ffordd a chatel. Rydych chi'n mynd i'r ffordd o'r clyfau cyhoeddi ac oeddiol y gweithio yma yn y gweithio'r ffordd yma yn y gweithio'n ffordd. We have to farm in a really new way. Yes we have to intensify it but the watch word must be sustainable intensification. Which is not an Oximawer and it's the prime goal of agriculture research. But it's not just production, it's the the way we govern the food system. Now some people argue that the fact that food is a globally traded commodity as a disaster. I think that's wrong. I think we have to make globalisation work in favor of food security. As I said, we're going to see larger production shocks, we need to see grain baskets able to compensate for problems in different areas. We need to do that in a way that doesn't penalize the very poorest countries that are not yet ready to be part of a globalized food system. Agriculture can be such an important engine of development at the very low level. And we have to get away from some of the ways that we support agricultural and rural economies in the rich world, which are obscenely affect distort food prices in the way that particularly affects the poorest parts of the world. And the world is so different today, so many of the bottom billion live in big mega cities such as Lagos in the picture here. And in Lagos, the cost of food on the ground is intimately connected with global world food prices. If we get global food prices wrong, then people in these big mega cities will starve. And finally, and the question I'm going to ask at the end, I want to talk about individual decisions. I don't believe we can produce enough food and govern it well to solve all problems. We have to take hard decisions ourselves about the way we waste food. A third of all food we grow is wasted. A lot of it is wasted in the home. And this cartoon shows how diets have gone in the West and are likely to go in the emerging countries. It's not a question of making decisions that are rational ourselves and irrational overall. It's irrational for us to eat the type of diet we're doing. It's making us ill and it's putting an enormous pressure on the environment. And this last slide, if we get everything wrong, then we're going to see the type of civil disturbance that in these pictures here were the precursor to the Arab Spring. So the question I want to end up with is how do we make decisions about diets? Changing diets is one of the ways we need to cope with food security. How do we make decisions that even though rational we don't make ourselves and how do we make them collectively? And I hope at least some of you will come and join me to debate these at the end. Thank you.