Because we aren't certain about the effects of GMOs, we must consider one of the guiding principles in science, the precautionary principle. Under this principle, if a policy or action could harm human health or the environment, we must not proceed until we know for sure what the impact will be. And it is up to those proposing the action or policy to prove that it is not harmful.

So we draw lines around our property, our counties, our cities, our states, our countries. And, boy, do we act as if those lines are important. I mean, we go to war. We will kill and die to protect those boundaries. Nature couldn't give two hoots about our national boundaries.

What about our children and grandchildren and their children and grandchildren? Do we not want them to live healthy and happy lives?

One of the joys of being a grandparent is getting to see the world again through the eyes of a child.

Water is our most precious resource, but we waste it, just as we waste other resources, including oil and gas.

Plastic bags are bad and for the most part unnecessary.

Aboriginal people are key because they have a different sense of where we belong and how we interact with nature.