Negative feedback: reversing carbon emissions

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<p>It is increasingly clear that putting less carbon dioxide in the atmosphere will not be enough to combat climate change; we take a look at the effort to actively remove the stuff from the air. Our correspondent takes a ride on Chicago’s Red Line, whose length represents a shocking level of inequality. And why a push to go organic in Turkey isn’t everyone’s cup of tea. For full access to print, digital and audio editions of <em>The Economist</em>, subscribe here <a href="http://www.economist.com/radiooffer" rel="noopener noreferrer" target="_blank">www.economist.com/radiooffer</a></p><p><br></p> <hr><p style='color:grey; font-size:0.75em;'> Hosted on Acast. See <a style='color:grey;' target='_blank' rel='noopener noreferrer' href='https://acast.com/privacy'>acast.com/privacy</a> for more information.</p>