Rice yields are plunging due to balmy nights, according to the first “real world” experiment on the effect of global warming on crop yields. The decline is twice as fast as that predicted by climate modellers who it turns out neglected the fact that global warming is most intense at night, when tropical plants need to cool off and respire. The results suggest that global rice yields could fall by a disastrous 50% during the coming century. (New Scientist)