Maybe this is not the line of work that you are interested in, but one way could be through politics and economy.
I have though and written a few draft and unpublished words about the idea of testing economy regulation at the transaction level, in a sort of democratic way. Imagine you go to a market on the Internet to buy a product or a service. Before you do it you have to rate another two transactions going on by considering one of them relatively more or less "ethical" than the other. The more ethical one would get a huge discount and the other one an equivalent penalty.
By continuously doing these ratings consumers would eventually internalize that some consumption patterns are "better" and therefore more rewarding to their own savings (since "better" products tend to have a discount).
Hopefully people would start prefering some products from underdeveloped economies, which would help them fight hunger by strenghtening their productive mechanisms, no matter how weak (better to give means than ends).
For example: It could become normal to prefer products like cofee from africa, since more developed economies already control the market of more advanced technologies.
This is not the focus of my PhD so I have tried to catch the attention of some african students to this idea - to make a small computational test, but with no success so far.
I can give you more details in case you are interested.
This is one of the most generous and relevant questions I have seen in RG so far.
Some problems that threaten food supply on a large scale that are amenable to bioscience approaches are plant pathogens, salinification of soil, drought, and warming temperatures.
Dear Fernando, Thank you very much for your contribution, Although my field is the Science and Technology Food, I agree with you that the political and economic influence in many ways. I hope that their ideas can be developed and bring benefits to the needy, although it is not my work item, I've always said that a key to the fight against hunger is to avoid food waste and assessment of waste. I wish that intellectuals like you to agree to use their ideas to benefit the needy .
Dear Adam , are very strong issues, besides that I think that post-harvest losses and waste of waste are also relevant. Do you have any item where these issues are addressed ?, although it is not my master's thesis topic I very interested in the subject. Thank you.