If you’re concerned about your personal finances, or energy security or climate change, and you want to cut down on your use of fossil fuels, Sustainable Energy—Without the Hot Air explains which actions make a significant difference and which make very little.
Ancient Peruvian civilisation grew mighty by harvesting guano
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The Chincha Kingdom was transporting seabird excrement from islands to
valleys as early as the 13th century, and this powerful fertiliser may have
been key...
4 hours ago
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