A natural habitat is an ecological or environmental area where a specific species lives. It is the place in nature that particular species calls home. To help picture what this means, think of a zoo.
Quick Answer. A mixture of vinegar and borax will kill most algae growing on bricks and concrete. Homeowners do not need harsh chemicals to get rid of these pesky growths.
Clean the walls with Vital Oxide which kills mold on contact and will repel mold growth for some times as long as water source is cut off. Then after walls dry ( assuming they are concrete) use a HEPA filtration vacuum to suck up the dead mold spores.