Freak cold spell draining South Korea's energy supplies

South Korea is so concerned about power blackouts during a freak spell of cold weather that the government has told some businesses to start limiting their heating.

The price of electricity has been kept lower than other energy sources like gas, so demand has risen.

But Asia's fourth largest economy is expected to continue expanding this year, putting even more pressure on the supply.

And the question is: will demand outstrip what the country can produce? Nick Ravenscroft reports from Seoul.