More than 17,100 basic and applied American scientists, two-thirds with advanced degrees, have signed the Oregon Institute of Science and Medicine’s Global Warming Petition, which says in part, “There is no convincing scientific evidence that human release of carbon dioxide, methane, or other greenhouse gases is causing or will, in the foreseeable future, cause catastrophic heating of the Earth’s atmosphere and disruption of the Earth’s climate.”But Al Gore refuses to debate those who say global warming is not a crisis. Maybe it’s because climate alarmists tend to lose when they debate climate realists. Or because most scientists do not support...