The water hyacinth is an invasive water plant from South America that has taken over waterways in Africa and Southeast Asia. This plant exacerbates the problem of schistosomiasis via multiple mechanisms. First, the plant forms large floating mats that provide shallow calm habitat for the snails that spread schistosomiasis where there was no appropriate habitat before (only open water). The plant encourages conditions favorable for the snails that spread schistosomiasis over other snail species by driving down dissolved oxygen levels via decaying plant matter. Schistosome-bearing snails are pulmonates in Africa, therefore they can breathe oxygen straight from the atmosphere rather than relying on gills. Additionally, the mats are capable of breaking apart and floating long distances, thereby transporting infected snails from one infection foci to start another. The water hyacinth requires large amounts of nitrogen to flourish and therefore tends to be a problem in water bodies impacted by agriculture, waste treatment, or industry. While bio-control measures have been imported to deal with the noxious weed, my current remote sensing work suggests that climate is a much stronger indicator of water hyacinth aerial coverage that the presence of bio-control measures.