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Sidewalk chalk shows at every charity run, music festival, chalk art, and community event. It’s a fun way to express yourself and is practically disposable and biodegradable. You wipe away your art when the festival ends and toss the rest in the trash. But how does it affect our environment? Is sidewalk chalk bad for …

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Silica is a compound of silicon and oxygen that exists practically everywhere on the Earth’s surface, particularly in rocks and water. It is widely distributed among soil, beach sand, granite, quartzite, dolomite, etc…Because silica occurs naturally as sand, it can give some degree of alkalinity to the soil. But is hydrated silica bad for the …

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Since the beginning of history, gemstones have been intertwined with the fates of kings and empires. From sapphires and rubies mined by children’s hands to the environmental and societal catastrophes of diamonds, the light finally shines on humanity’s dark obsession with these beautiful, crystallized minerals. Given their past, is it possible to mine ethical gemstones? …

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