<p>After petrol subsidies were slashed, protests of surprising ferocity have flared up across the country—and neither the government nor the demonstrators seem to be backing down. The illicit trade in rhinoceros horn threatens the animals’ survival, but scientists have come up with a convincing fake that could collapse the market. And the surprisingly subtle choices to balance meat-eating and environmentalism.&nbsp;</p><p>For full access to print, digital and audio editions of The Economist, subscribe here <a href="http://www.economist.com/radiooffer" rel="noopener noreferrer" target="_blank">www.economist.com/radiooffer</a></p>  For information regarding your data privacy, visit <a href="https://www.acast.com/privacy">acast.com/privacy</a>

Fuel to the fire: growing unrest in Iran

The Intelligence