Feed the World
Starvation and famine are not natural calamities. They are mostly man-made - and the meat in your butchers' windows plays a major part.
 
   
Livestock farming is extremely wasteful. Land that can support two meat-eating people can feed up to 60 people on plant foods. There are now so many animals that huge quantities of food are imported from the developing world - often the same countries whose children die from starvation. By giving up meat you remove yourself from this cycle of exploitation.