the ethic of reciprocity based on the idea that we should treat others as we would wish to be treated.

the effects of valuing Nature as a commodity or a service, thereby devaluing Nature’s contribution to people, including physical and psychological experiences, health, well-being, identity and provisions.

a small change in initial conditions that can lead to unpredictable results over the long term.

the problem of scale that arises regarding the speed of replacing existing technology by a new technology and regarding the widespread deployment of the new technology.

the social responsibility to protect the public from exposure to harm when scientific investigation discerns a possible risk; these protections can be lessened only if additional scientific findings show clear evidence that no harm will result.