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LONDON--It could be the last word in concrete solutions to carbon emissions: a paving slab that generates electricity with every footstep taken on it, providing clean power to both cities and remote areas not connected to a national grid. Best of all, it requires mainly used tires and concrete

You can't dump on this idea: A new $40 million initiative by the Bill & Melinda Gates Foundation will help develop futuristic toilets that transform human waste into usable electricity and fuel. The Bill & Melinda Gates Foundation announced on Tuesday that they are giving away more than $42 million to develop new, innovative toilets for use in the world's poorest regions