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Mobydisc said..
Last night the ABC TV news proclaimed in a ten minute story the fantastic news coal is no longer needed to be burned in the U.K. to generate the electricity needed there. We were told how renewables are the future.
What was not part of the story was how millions of trees in the U.S.A. are cut down, processed into pellets, shipped over to the U.K. and burned in furnaces to generate electricity. Just ignore half of the facts to make the story sound great. The unmentioned question is why is coal still burned in Australia? Are we going to start chopping down trees to generate electricity so coal can be kept in the ground?
There's a big difference between 1 tonne of CO2 emitted by burning trees, and 1 tonne emitted by burning coal.
The CO2 from coal has been trapped for ~300 million years. The CO2 from trees has been trapped for ~20 years.
Trees are a renewable resource. Coal isn't.
You can have a steady state of tree crop rotation, with trees growing, being chopped down, being burnt for fuel, and replanted, with
no net CO2 emissions. You can't do the same for coal.
Interesting side note: