Could it be done more efficiently? Sure, we could use a little less fossil fuel, but it still ends in the same wastelands of land, water, and sky. We could stretch this endgame out another twenty years, but the planet still dies.
Trace every industrial artifact back to its source-which isn't hard, as they all leave trails of blood-and you find the same devastation: mining, clearcuts, dams, agriculture. And now tar sands, mountain top removal, windfarms (which might better be called dead bird and bat farms).
No amount of renewables is going to make up for the fossil fuel or change the nature of the extraction, both of which are prerequisites for this way of life. Neither fossil fuel nor extracted substances will ever be sustainable; by definition, they will run out.
Bringing a cloth shopping bag to the store, even if you walk there in your global warming flip flops, will not stop the tar sands. But since these actions also won't disrupt anyone's life, they're declared both realistic and successful.
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