Africa and its population needs a great supply of food and clean water. Access to both will make a big difference in the daily activities of Africans. There are talks and conferences that were held in the past to understand, gather ideas, and effectively implement the green revolution.
You can do a lot, with the advent of internet and other forms of communications, you can connect to people or make awareness for the revolution. Sending seeds, farming techniques, educating women, speaking to suppliers who can contribute directly and indirectly. You are much needed and you can do a more than what you think.