63% of adults in the USA think global warming is happening. In every state and every Congressional district the majority admits the existence of global warming. There are only 37 counties in 14 states, according to Yale Climate Opinion, where the majority rejects this idea. The lowest percentage, the least belief in the existence of global warming, is 46% in West Virginia's Mason and Pleasants counties. If I were running a public education campaign on global warming, I'd consider targeting the people in those counties, in those states to change the 2% here and 3% there so that there is no longer even one county in all of the USA where ignoring the existence of global warming is a majority opinion, no matter how slim that majority might be.
Here is the list of the states and counties with their respective percentages of belief:
West Virginia: Marshall 49% Putnam 48% Grant 48% Mason 46% Pleasants 46%
Tennessee: Pickett 48% Roane 49% Hancock 49% Hawkins 47% Humphreys 47%
Kentucky: Muhlenberg 49% Mercer 49% Lawrence 48% Webster 47% Hancock 47%
Louisiana: De Soto 49% St Charles 49% Point Coupee 48% West Feliciana 47%
Alabama: Washington 49% Limestone 49% Jackson 49%
Indiana: Pike 49% Vermillion 48% Spencer 47%
Texas: Kenedy 48% Freestone 48% Rusk 48%
Utah: Milland 49% Emery 48%
Wyoming: Platte 47%
Kansas: Linn 49%
Arkansas: Independence 49%
Mississippi: Choctaw 49%
Oklahoma: Noble 48% Mayes 48%
Nebraska: Lincoln 48%
Based on the county opinion map of the "Estimated % of adults who think global warming is happening, 2014" at http://environment.yale.edu/...
Yale Climate Opinion's online maps show the poll answers to 14 questions on global warming beliefs, risk perceptions, and policy support by state, county, and Congressional district. It is a useful resource for those who want to use it.
Another question mapped by Yale finds that only 48 percent of people agree that global warming is caused "mostly" by humans. An analysis of that disappointing result is at
http://www.motherjones.com/...
Other majority opinion in the USA according to Media Matters (http://mediamatters.org/...) include support for abortion, equality for women, gun control, more support for renewables (up to 81%), stricter environmental laws... Not that any of these majoritarian opinions are organized to influence legislators, regulators, courts, the media, or other citizens the way that the active minorities on these issues have been.