Washington, Mar 11 (PTI) Increased use energy resources by fast growing economies like India, China and Brazil is driving the global oil and gas demand, US President Barack Obama said today.

"The problem is a great deal of uncertainty in the oil markets, part of it prompted by the fact that the economy's growing faster in some places than others, but you've got China and India and Brazil and other emerging nations that are using more and more energy as their economies advance," Obama said at a news conference when asked about the rising gas prices in the US.

Following the current unrest in the Middle East, gas prices in the US have crossed USD 3.