James: The trouble with your pollution standard:
"Putting clouds of sulphur dioxide into the atmosphere is itself polluting and hence violates the second criterion" is that you have no clear definition of pollution. SO2 occurs naturally, driven by volcanoes etc. Further, pollution is when a substance is harmfully present, not just detectable. That's a higher standard and the subject of much work, as it requires understand a system, not just measuring a parameter. (Otherwise, you'd be calling CO2 itself a pollutant.) Further, you seem unaware that unforeseen effects can and are dealt with by doing experiments, perturbing systems, etc, as physics has done for centuries. You can't learn through definitions; that takes experience. Gregory Benford --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en -~----------~----~----~----~------~----~------~--~---
