Lichens are a type of fungi that live in close relationships with algae or bacteria. Unfortunately, the future is not looking very bright for these organisms, because they have no protective structures and are sensitive to environmental change. The lung lichen is a large species that, in the upcoming years, will find itself in trouble. Climate change will reduce the amount of available water and increase air temperatures. Global warming is also expected to change the environments where the lung lichen lives. One of the main threats will be the expansion of some very competitive trees. Among them, the black locust has become invasive, forming dense woods that will replace the native tree species. Even though it seems like the situation is bad, there is still hope! Lichen scientists are trying to figure out how to prepare suitable shelters to save lung lichen from climate change.