Leaders of 20 major developed and emerging economies are expected during a summit in London on April 2 to ensure that their stimulus measures to address the global financial crisis will also lead to the creation of a low-carbon world economy, according to a senior British official.

The Group of 20 leaders are also expected to reaffirm their commitment to advance trade liberalization to ward off protectionism, said Simon Fraser, director general for Europe and Globalization at Britain's Foreign and Commonwealth Office.

"We must make sure that the actions that we take in dealing with this crisis help to equip us in the long term for a low-carbon, more effective, cleaner global economy going to the future," Fraser said in a recent interview in Tokyo.