Idk what all the world leaders have & haven't done, but I know we've made great progress in green technology. Compared to 2009, we're poised to more than double the efficiency of solar panels & the installation price per watt has fallen from $8.50 to $2.77. Bigger, better, better understood...and also cheaper.
This is what you want to see if you want the whole world adopting renewable energy sources.
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