Complex sentence: As a response to the global food crises which began in 2007, some regions have raised production of drought and pest resistant crops such as Cassava, which while good for providing raw calories, has limited nutritional value and even has Anti-nutritional factors if not cooked properly.
Split into simpler sentences: As a response to the global food crises which began in 2007, some regions have raised production of drought and pest resistant crops such as Cassava. While good for providing raw calories, the crop has limited nutritional value and some strains even have anti-nutritional factors if not cooked properly.