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Jack Guy, CNN The city of Amsterdam is going green in an attempt to combat an age-old problem — public urination. The local council has installed eight hemp-filled, sustainable urinals in the city’s “wild peeing” hotspots. At first glance, the urinals — called GreenPees — look like traditional planters, with greenery sprouting from the top. But look...

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The mineral phosphate is indispensable for the growth of plants and therefore important for the agricultural industry. However, the main mining areas in China and Morocco are slowly being depleted. Phosphate reserves will dwindle in the near future. It is therefore important to think ahead about other ways of producing phosphates. One of the possibilities...