The concept of bio refers to anything that is not produced by chemicals.
An organic vegetable garden, for example, is easier than we think. For that we just need to create an ecosystem that produces the products in a natural way. Also known as permaculture, the vegetable garden has a logic that we must follow. For example, leftover vegetables (peels, leaves, ...) can go into a compost and this soil can be used as fertilizer. Another important suggestion is to attract birds so that they can diminish some insects. The biodiversity will help the crop to grow in a sustainable way. One of the techniques used to be successful is to use several different plants that together protect and develop each other.
We have a responsibility to the world, so it is important to recycle and use biodegradable materials.