If we have any hope of finding ways for seven billion people to live well on planet with finite resources, we have to learn to use our resources efficiently. Plastic bags are neither efficient nor environmentally friendly.

There are some things in the world we can't change.

Some solutions are relatively simple and would provide economic benefits: implementing measures to conserve energy, putting a price on carbon through taxes and cap-and-trade and shifting from fossil fuels to clean and renewable energy sources.

Rapid population growth and technological innovation, combined with our lack of understanding about how the natural systems of which we are a part work, have created a mess.

The failure of world leaders to act on the critical issue of global warming is often blamed on economic considerations.

Ultimately we need to recognize that while humans continue to build urban landscapes, we share these spaces with others species.

The event of creation did not take place so many eons ago, astronomically or biologically speaking. Creation is taking place every moment of our lives.