Germany's energy shift from nuclear to renewables is costly and complicated. The move was inspired by the nuclear disaster in Japan - and it is the Japanese who are inventing some of the solutions.
The International Labor Organization has urged a stepped up effort to eradicate child labor within eight years. Half of the world's 28 largest companies have been accused of using cobalt metal that was mined by children.
Northvolt has said it will build Europe's biggest electric car battery factory in its home country, Sweden. The start-up wants the site to rival Tesla's 'Gigafactory' in the US and LG Chem's proposed site in Poland.
Tech visionary Bill Joy has been investing much of his time and a lot of money in Ionic Materials, a startup developing a solid-polymer-electrolyte battery. Is it the global game-changer everyone is waiting for?
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