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What happened to global warming?
02-27-2013, 07:52 AM, (This post was last modified: 02-27-2013, 03:16 PM by thokling.)
#16
RE: What happened to global warming?
Nice find, FT. Put the dollars back where they belong.

I found this sneaky thing lurking around the Internet:

Quote:Nuclear: Less CO2 than solar, hydro, biomass
By Mark Halper | February 19, 2013, 6:31 AM PST

[Image: nuclear-v-other-sources-co2.jpg]

There is no such thing as completely "green" energy. All forms of electricity generation have some detrimental environmental impact - some relatively little, some enormous.

One of the most closely watched effects is emissions of carbon dioxide - the sort of thing that makes fossil fuels like coal and natural gas notorious.

Levels of CO2 in the atmosphere are linked to rises in Earth’s temperature, and thus to global warming, climate change and all that. Fossil fuels belch plenty, as the chart above shows. It illustrates how many tonnes of CO2 are emitted per gigawatt hour of electricity generated by different generating technologies.

The chart is a "lifecycle" analysis that takes into account CO2 emitted not only during electricity generation, but also by the mining, manufacturing, construction and other processes it takes to get a power plant up and keep it running.

It’s no surprise that coal and natural gas tower above the others. But some of the other marks might raise a few eyebrows. "Renewable" power sources solar PV and biomass are both more CO2-intense than nuclear, as is hydro. Nuclear is on a par with geothermal, and virtually the same as wind.
smartplanet:Blogs:Business
Nuclear: Less CO2 than solar, hydro, biomass

"Life-cycle", from what I've been able to gather, refers to the overall time the technology's been in use. So it's only useful, perhaps, if used in more manipulative statistics.

There's another report from a few days before the one you posted which contains the following image:

[Image: makmCdI.png]
NEI.org:Protecting the Environment
Emissions Produced by 1 Kilowatt-Hour of
Electricity Based on Life-Cycle analysis


According to this chart in units per KwH, hydropower and nuclear power are the leaders in clean CO2 emissions. Wind and biomass are margically better, but still produce up to twice the amount of CO2.

The big belchers per the chart are solar, natural gas and coal. So there's a discrepancy somewhere.

All figures have to be applied against the energy output in KwH to calculate the effectiveness of the technology, placing some sort of value on emissions (likely negative or fractional). But this value placement appears to be paid for by corporations to "independent studies" that favour the corporation.
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02-28-2013, 09:21 AM,
#17
RE: What happened to global warming?
The problem with hydro is that it destroys natural ecosystems (with huge impacts on people as well) and nuclear creates the most toxic waste known to man, with existing technology. Their CO2 footprints are irrelevant in the greater picture.
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02-28-2013, 07:38 PM,
#18
RE: What happened to global warming?


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