Which U.S. presidential campaign was the first to achieve carbon neutrality by implementing comprehensive sustainability initiatives including biodegradable campaign materials?

In recent years, political campaigns have been under increasing scrutiny for their environmental impact. From massive rallies to countless promotional materials, campaigns generate significant waste. This trivia tests your knowledge about how political campaigns are addressing sustainability concerns, a growing factor in voter perception and campaign branding strategy. How well do you know the green initiatives behind the political podiums?

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Barack Obama's 2008 campaign
Jay Inslee's 2020 campaign
Bernie Sanders' 2016 campaign
Al Gore's 2000 campaign