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What future innovation does society most need? Score    
clean, renewable energy that is cheaper than coal 77 [?]
A way to end both hunger and obesity. 76 [?]
Sustainable energy 75 [?]
clean energy 73 [?]
develop equipments to collect all kinds of energy from nature, i.e., solar, heat, wind, water, etc. 72 [?]
Green energy. 72 [?]
An efficient method for creating biofuels from waste materials 71 [?]
Safe, effective nuclear power combining both fusion and fission. 71 [?]
Inexpensively obtained clean water 70 [?]
Widespread use of nanotechnology in medicine, primarily for the purpose of monitoring vitals and detecting infection. 69 [?]
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