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"Smartphones are owned by one in five people and have changed how many of the world's most important industries work - from journalism to farming. But their production carries a cost; using more than 40 elements that are mined with untold environmental and social effects on every inhabited continent on earth. "

"This week in the Planet Earth Podcast: Phil Kerrison and Lars Brunner from the Scottish Association for Marine Science explain how seaweed could be cultivated to fuel a power station, your car or even aircraft."

Paraguay is the greenest place on earth to make and drive an electric car, according to analysis by independent research group, Shrink That Footprint, which has assessed the impact of grid-powered electric vehicles (EV) in twenty of the world's leading countries.

"Genetic modification has so far mainly been confined to developing crops that tolerate herbicides and resist pests. It has done little to increase yields"