PB, I still haven't checked those graphs. Do you think we can take them as being reasonably accurate?
I enjoy looking at them. Today I went to the Melbourne museum and happened upon life and geological era in which they happened [the detail of which I'd long forgotten] which fitted nicely with that graph [and my theories on life's interaction with the atmosphere, tectonic activity and stripping of the ecosphere of carbon].
The dominant theme I get from those graphs is the constant decline of CO2, other than during the carboniferous era when it plummeted to near-zero before going back up over 1000 ppm for the dinosaur era.
Another interesting thing is the constant average temperature of about 22 degrees, but with plunges down into chilliness which I suppose were ice eras.
I note we are currently in a severe CO2 deficit situation and also in a low temperature time. Hence the ice age, which is currently [and I believe only temporarily] on vacation, so we are enjoying some warmth [though New Zealand usually misses out on that happy circumstance].
I think we should aim at 1000 ppm CO2. I really can't get worried at current levels and am sure that increasing CO2 is a good thing. If we get over 1000 ppm and start heading for 1500 ppm, we should probably think more carefully about what's going on [and for the low cost involved, might as well be keeping a very close eye on matters anyway].
I don't see why everyone is so worried. In the past, I have been worrier number one about environmental harm, while nearly everyone else has been blissfully uncaring. Now, suddenly, it seems cult hysteria has broken out and every man and his dog is panicking about something with which I can't see a problem.
My worries proved to be well-founded, such as lead in petrol, muck in Manukau Harbour, carcinogens here there and everywhere, dietary contamination and inadequacy, diesel particulates, benzene in petrol.
Mqurice |
