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Africa must harness green energy tech
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Scientists revisit methane's climate effects
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Positive signs emerge in fight against HIV
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A chance to consider global sustainability
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The facts about Africa’s 'rising middle class'
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How livestock and sustainability could mix
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The seas cannot be saved on a paltry budget
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Air conditioning upsurge will matter to climate
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Climate spiral update shows bleak future
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Nigeria approves USD80 billion nuclear plants
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