Food/Decentralizing food production
While this article gives suggestions on increasing food yields, the fact is that we already have enough food to feed everyone on the planet [1]. The problem, unsurprisingly, is distributing it.
The problem in food-distribution can be solved by small-scale local production. If everyone has food available to them locally, food security is ensured; no one need starve due to the inefficiency and injustice of the distribution of our food-resources.
Decentralized food production would mean a reduction in transport costs. Transport is currently a main contributor to the price of food (up to 77% of the total value of the food in sub-Saharan Africa [2]).
Decentralization would also preserve the freshness and nutritional value of our food without the need for preservatives or energy-expensive refrigeration.
Statistics are sketchy, but a very significant fraction of the world's food currently spoils before it can be consumed. (One estimate is that 35-40% of food produced in India spoils`[3].) Decentralizing production will go a long way towards reclaiming this food for people.