text: ?Lukewarmers? are those scientists (and others) who believe the balance of evidence is middling between ?climate alarmists? (who tend to think that the global temperature rise will lie in, or even exceed, the upper half the IPCC?s 1.1 C?6.4 C range of projected temperature rise this century) and ultraskeptics, or ?flatliners? (who tend to think that the addition of human-generated carbon dioxide has virtually no impact on global temperatures).