It's so simple yet can definitely help poor people. If they would stop and think for a second.
Literally whenever you eats food you can have an opportunity to save the seed and plant it in some dirt. Even my country's government likes to support agricultural initiatives... but I'd bet some people simply aren't interested in it.. well then it's your own fault of you are hungry on some days and don't even try. I'm not talking about people with literally nothing- I'm talking about people who at least have somewhere to stay dven if by family.