Complex sentence: With an increasing population the production of food needs to increase with it, it is estimated that a 70% increase in food production is needed by 2050 in order to meet the Declaration of the World Summit on Food Security.
Split into simpler sentences: With an increasing population, the production of food needs to increase with it. It is estimated that a 70% increase in food production is needed by 2050 in order to meet the Declaration of the World Summit on Food Security.