The National Association of Biology Teachers adopted a new position statement in support of teaching climate change in March 2019.
Observing that "[t]he overwhelming preponderance of peer-reviewed studies and the vast majority of climate scientists agree that Earth's atmosphere is warming and climate changes since the beginning of the Industrial Revolution are anthropogenic and due primarily to the burning of fossil fuels and deforestation," the statement urges educators to "teach global climate change in an effective, detailed, and scientifically- and pedagogically-honest manner and work to encourage the development of and support for standards, curricula, textbooks, and other instructional frameworks that prominently include global climate change and reflect current consensus understanding of its mechanisms."
NCSE maintains a list of scientific and educational groups that have expressed their support for teaching climate change at Voices for Climate Change Education.