It began with an anonymous Internet posting, and a link to a wonky set of e-mails and files. Stolen, apparently, from a research center in Britain, the files showed the leaders of climate-change science discussing flaws in their own data, and seemingly scheming to muzzle their critics.

Now it has mushroomed into what is being called "Climate-gate," a scandal that has done what many slide shows and public-service ads could not: focus public attention on the science of a warming planet.

Except now, much of that attention is focused on the science's flaws. Leaked just before international climate talks begin in Copenhagen -- the culmination of years of work by scientists to raise alarms about greenhouse-gas emissions -- the e-mails have cast those scientists in a...