reader comments 8 with 6 posters participating Share this story Earth Day was April...
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reader comments 60 with 44 posters participating Share this story Earth Day was April...
Enlarge / An eastbound manifest freight swoops through an S curve in Lombard Canyon,...
Enlarge / Man’s hand holding a cardboard sign that says SAVE THE PLANET Getty...
Enlarge / Either of two reaction chambers (bottom) can be targeted by concentrated sunlight....
Enlarge / An offshore wind farm under construction. reader comments 44 with 28 posters...
Enlarge / All that’s missing are some batteries. reader comments 8 with 8 posters...
