Tennessee enacted a law Tuesday that critics contend allows public school teachers to challenge climate change and evolution in their classrooms without fear of sanction

Tennessee enacts evolution, climate change law - latimes.com: "Republican Gov. Bill Haslam allowed the controversial measure to become law without his signature and, in a statement, expressed misgivings about it. Nevertheless, he ignored pleas from educators, parents and civil libertarians to veto the bill.

The law does not require the teaching of alternatives to scientific theories of evolution, climate change and "the chemical origins of life." Instead, it aims to prevent school administrators from reining in teachers who expound on alternative hypotheses to those topics.

The measure's primary sponsor, Republican state Sen. Bo Watson, said it was meant to give teachers the clarity and security to discuss alternative ideas to evolution and climate change that students may have picked up at home and want to explore in class."

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