Since 1850, burning of fossil fuels, coal, oil and natural gas has increased 100 times to produce energy as the world has industrialized to serve the world's more than 6 billion and growing population.

In the remaining months, we should focus on achieving more robust international involvement in training of Iraqi soldiers, police officers, judges, teachers, and doctors - all key elements needed to end the sectarian and civil conflict and build Iraq's future.

America has also forever lost the service of thousands of good soldiers who are now disabled as a result of battle wounds in Iraq. Many others will need mental and emotional rehabilitation before they can return to normal life.

President Bush's war on Iraq is viewed broadly in Islamic communities as an attack on Islam, and thus the President has alienated a large part of one fifth of the world's population.

Clearly, a stable, unified and democratic Iraq cannot be achieved militarily by the U.S.

We need to make it clear that we will withdraw from Iraq within 6 to 9 months - so that the Iraqis will know that they must stand up and defend the opportunity given to them.

As a scientist, my attention became totally focused on global warming some 15 years ago by the elegant and powerful measurements of carbon dioxide trapped in ice cores taken as much as 2 miles deep from the great East Antarctica ice sheet.