We all require energy to sustain ourselves and to generate an income. Permaculture encourages us to develop short-term, medium-term and long-term yields. This can take teamwork and planning but we can still start right away. Notice how the vegetable in the icon picture has a bite taken out of it.
You can think of a yield as a positive feedback loop, a reward that will reinforce the behaviour that helped generate it.
Pictured above is Rogers Wasibi of the Mt Elgon Cofee and Honey Co-operative in Uganda. This high value crop supports tree planting and habitat regeneration as part of a permaculture led re-afforestation scheme, built around generating sustainable yields of coffee and honey.