All Brazil's cars to use ethanol

Two thirds of all cars in Brazil are fuelled with ethanol, said the chief executive of Petrobras, José Sergio Gabrielli, speaking last week at the World's 20th Petroleum Conference, in Doha, Qatar.

Gabrielli, head of the third-biggest Brazilian oil producer, said the company is increasing its ethanol production and predicts all cars in Brazil will soon be running on ethanol, while also exploring new oil fields.

More than 5,000 delegates, including 500 speakers, and oil and energy ministers from 50 states around the world, attended the Doha conference.

Opec's secretary general, Abdalla Salem El-Badri, forecast that the world's energy demand will increase by more than 50 per cent from 2010 to 2035. But Mr El-Badri said news that Libya will return to full oil production in 2012 should ease worries over shortages due to the Arab unrest. Sheikh Hamad Bin Khalifa Al Thani, the Emir of Qatar also confirmed that oil and gas rich Qatar will continue its energy supply.