The American republican experimentproved Madison wrong in his general expectation that the compensating benefits of a larger political sphere would check and constrain faction.
Some of these countries have used polymer only for commemorative bills: these include China, where paper money was first used in the seventh century, and Brazil, where an experiment with plastic in 2000 proved unpopular.
Because climate change or global warming can neither be proved or disproved using the scientific method because we are living and taking measurements within the only experiment there is or ever can be.