Global supply shortages have hit toy shops in the US and coffee producers in Brazil. In Canada, the country's liquid gold - maple syrup - is running low. The Quebec Maple Syrup Producers (QMSP) - the so-called Opec of maple syrup - has released about 22m kg from its emergency larder, nearly half the total in reserve. Booming demand and a shortened harvest had caused the shortfall, QMSP said. It is the first time in three years the reserve has been used. "That's why the reserve is made, to never miss maple syrup. And we won't miss maple syrup!" Helene...