Lexie is a former Staff Writer at Forbes Home and has over 6 years of professional experience as a writer and editor in the home improvement space. She's previously worked at sites such as HomeAdvisor ...

Rooftop gardens have been touted as a type of cool roof that can help reduce energy use and costs. But one plant life you don't want to see on your roof is Gloeocapsa magma, a blackish algae that ...