Net grain production is the difference between the amount of grain a country produces and the amount of grain its citizens consume. It is positive if the country produces more than it consumes, and negative if the country consumes more than it produces. The figures shown below represent the net grain production of four countries in 1990 and projected for 2030.
Which of the four countries had to import grain to meet its needs in 1990? India, US, China, Russia
Which of the four countries are expected to need to import grain to meet needs in 2030? China, Russia, India, US
Given that India and China are the world's two most populous countries, what does this graph tell you about how world agriculture will have to change between now and 2030? It will need to increase.