The two principal mechanisms by which the orbital effects on the regional / seasonal distribution of insolation instigate climate change are melting / growth of ice sheets (thus albedo change — > temperature change) and the slow feedback effect of GHGs responding to temperature change, thus increasing the greenhouse effect. (dotearth.blogs.nytimes.com)
Advertising is the principal mechanism of monetizing online video, generating more revenues than subscription or transactions, according to the IHS and Vidiro white paper. (news.ihsmarkit.com)
They are the principal mechanism for ADBA's policy development, and give members a chance to have their say, contribute to decisions for the industry and discuss matters of common concern with other businesses. (adbioresources.org)