there's still a bunch you can buy. apparently many "toxic" plants are only mildly toxic for cats/dogs. i don't think they make much difference for air quality,

there's still a bunch you can buy. apparently many "toxic" plants are only mildly toxic for cats/dogs. i don't think they make much difference for air quality, but i bought some "air purifying" plants and cross-checked them against the aspca list for safety: https://www.aspca.org/pet-care/animal-poison-control https://www.aspca.org/pet-care/animal-poison-control (my cat likes to munch on my spider plants, even with cat grass available)