too bad it wasn't done 40 years ago when it would've made enough difference
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too bad it wasn't done 40 years ago when it would've made enough difference
too bad we're living at the end of an ice age and there's no evidence that humans are the cause of rising temperatures
did you know a single volcanic eruption puts more co2 in the atmosphere than every car on the planet
maks you're about the only one on this forum with a brain.
exactly...Quote:
Originally Posted by maks
ice ages and warm ages come and go regardless if we're polluting or not...
the only question is "are we speeding up the inevitable"..
yeah I'm used to thatQuote:
Originally Posted by Lexi Persimmons
I think we're pretty arrogant to believe we're causing geologic events that were happening for billions of years before we evolved, it's pretty much the new version of religion, man drastically overestimating his importanceQuote:
Originally Posted by cbarry
you might want to read/watch the Nova piece on the co2 concentrations in the antarctic ice cores
incidental co2 releases are compensated for by temporary increases in the biomass of marine flora, which rebalance the carbon cycle within a few years
sustained releases can't be easily remediated by this mechanism
what's worse are the increased releases of alkanes and halogenated alkanes which are much greater promoters of the greenhouse effect and can only be remediated by incredibly slow upper-atmospheric chemical processes
the ice caps melt all the time this is just the first time we've been around to watch it and just like our superstitious ancestors we're convinced that we've angered the earth spirits and are to blame
as measured in the ice cores, co2 concentrations from the last 400,000 years - that's the last five glacial cycles - have never been as high as they are now. they rarely pushed 350ppm, right now we're pushing 400
graph
http://en.wikipedia.org/wiki/File:Vostok_Petit_data.svg
great article & more graphs: http://www.daviesand.com/Choices/Pre...ning/New_Data/
according to the graph that you just posted thay're only at about 285 and have been higher no less than two times in the last 400,000 yearsQuote:
Originally Posted by blumpkin blownuts
also it looks to be a pretty predictable cycle, there's a spike every 100,000 years or so and our current levels fit right into the pattern
I didn't realize we'd had cars that long
ok reading those graphs more closely they have rarely passed 300 (i know i've seen something before that indicated closer to 350, maybe some correction factor)
but let's go with 300 as the highest. if you look closely you'll see that the last ice core reading is around 380, and its only risen sicne
right, it was periodic (T ~= 80,000 y) up until 150-200 years ago -- industrializationQuote:
Originally Posted by maks
co2 gets such a bad rap
all those carbonated drinks are killing polar bears
no, it spikes every 100,000 years what's happening now happened 3 times prior to industrializationQuote:
Originally Posted by blumpkin blownuts
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