Question

What would be the most effective and ecologically friendly way of killing mold and why?

Since mold is one of the immobile protists, releasing heterotrophic protists to act as predators would kill it.

Since mold is an autotrophic protist, depriving it of light would keep it from photosynthesizing, and it would die.

Since protists need moist environments in order to grow well, drying out the area would kill the mold.

Since protists need to move their flagella to gather food, spraying red tide toxins on the mold would paralyze and kill it.