While writing the comments on Facebook, I wrote about the circle of life.

It got me thinking about how we are damaging the circle of life.
Humans are using up a lot of resources. We eat some and we waste a lot.
Also we send human wastes into garbage dump, and then throw it into rivers.
The minerals in our wastes must be returned to the lands where we grew up the food. Otherwise we have taken out the minerals, transported it to elsewhere and thrown it down the river. The land has grown poorer, and the sea has gotten too much of some minerals that it doesn't want.

The problem with this is that we have too many algal growth in the seas, and too little nutrients in the soil.

Then we add artificial fertilizers. Substituiting some minerals that we know about. What about the minerals that we don't know about?

We might think that the food industry is not causing any environment problems, but it is probably causing more problems than the fuel industry.