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By 2050, the world population will have grown to 9.6 billion people - 2.6 billion more than today. at the same time, growing middle class members in india and china are already eating more meat than ever. the earth population is growing in the most inconvenient time. to prevent global warming, the humanity should have more land to cultivate raw materials for biofuels. at the same time, cutting down forests to provide more land for agriculture is impossible - and so the planet is choking with greenhouse gas emissions, in the last year they broke all records. to feed additional mouths, farmers must increase productivity. but not everything is so simple. cereal production should be increased by half, that there would be no lack of food. in 40-year time there will not be enough of it. scientists note that the growth in crop yields is not the same throughout the world. for example, in some parts of india and eastern europe the yield has not been increasing for many years. ниже надо перефразировать – затруднено понимание смысла. in many parts of the world, the increase in performance is not due to insufficient investment in agriculture. even where the service delivered to farmers all the achievements of science, improve performance more than a certain level will not work, because nature does not allow to grow in one area over a certain amount of grain.