The Climate Denier Caucus is a list put together by ThinkProgress of members of Congress that have in some way denied climate change. Disrupt Denial is an excellent campaign from Forecast the Facts which identifies the biggest corporate donors to this dubious caucus, attempting to shame them to no longer donate to such candidates.
thinkContext is a web browser extension which notifies users of progressive campaign information related to what they are viewing. It includes information on a variety of labor, LGBT, environmental and political campaigns and recently added support for Disrupt Denial. As you can see in the screenshot, when you visit the website of a company listed in the campaign it will show you how much money they have donated to members of the Climate Deniers Caucus.