i think it could be a reference to saying no to plastic clothes hangers, since clothes hangers are an enormous source of plastic waste.

Edit: yes i understand the anti dangerous abortion symbolism, but here are some sources to explain the environmental impacts that are starting to gain some press.

https://torrancerecycles.org/guide/coat-hangers-plastic/#:~:text=Plastic hangers typically wind up,and BPA into the environment.

https://www.commonobjective.co/article/are-sustainable-hangers-all-they-re-cracked-up-to-be#:~:text=Made predominantly from expanded polystyrene,800-1%2C000 years to breakdown.

https://www.linkedin.com/pulse/plastic-hanger-fun-fact-20-billion-landfills-every-year-gary-barker