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Afghan security forces dissolving fast in Taliban onslaught

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PBS News Hour

Can concrete, a major Co2 emitter, be made greener?

After water, concrete is the most consumed substance on the planet and its production is expected to grow to 5.5 billion tons by 2050. But its production, which involves cement, comes at a huge environmental cost -- accounting for almost eight percent of carbon emissions globally. Mori Rothman reports on the industry’s attempt to reduce concrete’s carbon footprint with cleaner cement.
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