While increases in population and wealth will lift global demand for food by up to 70 per cent by 2050, agriculture is already feeling the effects of climate change.
This is expected to continue in coming decades.
Scientists and farmers will need to act on multiple fronts to counter falling crop yields and feed more people.
As with previous agricultural revolutions, we need a new set of plant characteristics to meet the challenge.
When it comes to the staple crops — wheat, rice, maize, soybean, barley and sorghum — research has found changes in rainfall and temperature explain about 30 per cent of the yearly variation in agricultural yields.
All six crops responded negatively to increasing temperatures — most likely associated with increases in crop development rates and water stress.
In short: Demand, supply, price, value.
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