Conventional agriculture appears to be decreasing in energy efficiency and has some adverse effects on the environment. Therefore, the marriage of agriculture and ecology is welcome, but the debate on how to achieve goals for sustainability is far from concluded. The most important aspect of sustainability is creating systems that have an indefinite future. This point is too often ignored. A number of “terrible” questions can be asked about sustainability. A list of 24 ingredients required for a sustainable agriculture is given. We want sustainable agriculture to be scientific, safe and sensible. People won't stop eating if the agriculture is not sustainable, but someday there may be little to eat unless sustainability is seriously addressed.