英文和訳
Over coming decades, though, such fundamental factors will matter more. A good guess is that food production will have to rise by 70% by 2050 to keep pace with population growth, the explosion of developing countries’ megacities and the changes in diet that wealth and urbanisation bring. Big increases will be harder to achieve than in the past because there is little unfarmed land to bring into production, no more water and, in some places, little to be gained by heaping on more fertiliser. Climate change may well exacerbate these problems. For the first time since the 1960s the yields of the world’s most important crops, wheat and rice, are rising more slowly than the global population. The world cannot feed today’s 7 billion people properly. How on earth can it feed the expected 9 billion in 2050? どなたかお願いしますm(__)m
