I can think about what [Mahatma] Gandhi said or [Martin Luther] King said about violence begetting violence, and still be true to my job by asking myself the question whenever we're confronted with a situation where some may be arguing for military action: Will this actually result in America being safer, or the most lives being saved?
The greenhouse effect of carbon-dioxide emissions does produce gentle warming if it is not counteracted by unpredictable natural phenomena, but it cannot be measured directly against the volume of such emissions.