The ecological problems we have to deal with in order to maintain our environment are colossal. Imagine that in 50 years there may not be a source of fresh water in the hemisphere not hopelessly clogged with Zebra mussels, and I haven't touched on the subjects of global warming or atmospheric pollution. We cannot win this war, only forestall it. What is the value of life if there is no larger power, if we are only a product of the laws of physics in the midst of eternal implosion or explosion, if our species really is just a parasite the earth caught long ago, if all traffic is terminal?

The only real raison de vivre is to make the joy outweigh the sorrow for as many living species as possible. The only obligation in life is to increase the quality of life for our fellow being, and to enjoy to the maximum this great gift of coincidence that has allowed us life.