Book excerpt: Most climate experts agree that industrial emissions of carbon dioxide either already have led or will soon lead to an increase in global temperatures. While many consider that reason enough to undertake dramatic political action, economist Thomas Gale Moore asks, So what? Both historical and economic analysis suggests, he argues, that a warmer climate would be, on balance, beneficial to both mankind and the environment. The book calls into question the entire campaign led by Vice President Al Gore and others to ratify the proposed treaty on global warming scheduled to be debated in the U.S. Senate early in 1998.