How could heavily fertilized lawns contribute to cyanobacterial blooms in lakes and oceans? A. Run-off from the lawns will get i
nto the water system, leading to large amounts of nitrogen that can be used by cyanobacteria in water systems. B. The large amounts of nutrient-rich grass that are created will be mowed down, with grass clipping bits eventually washing into sewer systems and into larger bodies of water. These grass clippings will serve as a nutrient source for cyanobacteria, leading to blooms. C. Large amounts of fertilizer will lead to excessive production of greenhouse gases (like CO2) from grass in lawns. Excessive CO2 production will lead to large blooms of cyanobacteria in water systems. D. They won't-the two systems are completely unrelated. How could grass in lawns contribute to effects in lakes and oceans?
"Nutrient pollution is the process where too many nutrients, mainly nitrogen and phosphorus, are added to bodies of water and can act like fertilizer, causing excessive growth of algae. Nutrients can run off of land in urban areas where lawn fertilizers are used."
This process is also known as eutrophication, and this causes dead zones, as the one in the Northern Gulf of Mexico by the coastal development and the run-off nutrients of the Mississippi River.
Malárie je způsobena parazity Plasmodium. Paraziti se k lidem šíří kousnutím infikovaných samic komárů Anopheles, nazývaných „vektory malárie“. Existuje 5 druhů parazitů, které způsobují malárii u lidí, a 2 z těchto druhů - P. falciparum a P. vivax - představují největší hrozbu
