Transportation engineers plan, design, operate, and maintain everyday systems, such as streets and highways, but they also plan larger projects, such as airports, ship ports, mass transit systems, and harbors. The work of civil engineers is closely related to the work of environmental engineers.
Two of the better-known toxic molds include Stachybotrys chartarum (black mold), which can cause everything from headaches to cancer, and Aspergillus, which can cause severe lung infections, or progress to whole-body infections. Mold is particularly dangerous for infants and children.
Sooty mold growth is of two types. The first is a deciduous growth on leaves, which lasts for the life of the leaf. The second is persistent growth on stems and twigs of woody plants and on humanmade structures. In this type, growth is renewed from existing mycelium of the fungi produced the previous season. Figure 2.