You don't filter smokestacks or water. Instead, you put the filter in your head and design the problem out of existence.

And to use something as elegant as a tree? Imagine this design assignment: Design something that makes oxygen, sequesters carbon, fixes nitrogen, distills water, makes complex sugars and foods, changes colors with the seasons, and self-replicates. and then why don't we knock that down and write on it?

Designing renders visible our hopes and dreams. It is the first signal of human intentions.

So when you see a regulation against lead, because lead is a bad in a regulators mind, what does that mean? You are not telling us what is good, you are just tell us what you don't want, not what you do want.

In the end, the question is not, how do we use nature to serve our interests? It's how can we use humans to serve nature's interest?'

In planetary terms, we're all downstream.

We realized we don't have an invention, that's why we gave it away.