F. This would not be nearly enough to create the nightmare scenario global warming alarmists paint of worldwide flooding caused by melting polar ice. Even if all the ice at the North Pole melted, sea levels wouldn't rise. This is because the Arctic is an ocean, and ice displaces the same volume of water. If the glaciers on Antarctica should melt, sea levels could rise a catastrophic 200 feet, because Antarctica is a continent. But temperatures in Antarctica in summer rarely rise above minus 20 degrees F. Water freezes at 32 degrees F. Unsurprisingly, the U.N. report says there is no evidence Antarctic ice is melting.
Most climate scientists believe global warming is occurring.
But there is dispute over what causes it, and whether, on balance, it would be harmful. This is mostly because of when warming is likely to occur. If hot summer days get hotter, this would be a problem. But if cold winter nights get warmer, this wouldn't be so bad. The greenhouse models assume most warming will occur at night and in winter.