Watch this animation (http://openstaxcollege.org/l/ CSFflow) that shows the flow of CSF through the brain and spinal cord, and how it originates from the ventricles and then spreads into the space within the meninges, where the fluids then move into the venous sinuses to return to the cardiovascular circulation. What are the structures that produce CSF and where are they found? How are the structures indicated in this animation?
Air Quality Dispersion and deposition o Airflow patterns Temperature inversion Warm air forms above cold air, trapping pollutants near ground Height of emission Time in atmosphere Warm air is above the cold air Troposphere: lowest layer Stratosphere: second Mesosphere Thermosphere Ionosphere Exosphere Pollution n troposphere o Acid rain comes from nitric oxide and sulfur dioxide released from electric power plants and motor vehicles o Heavy metal pollution o Before 1920, smelters were primary source of atmospheric pollution o After 1930, they added lead into the fuel and that increased lead emissions hugely o The 1970 clean air act required that lead be removed Pollution in stratosphere o No direct effect for human health o Can influence climate Aerosols can cool earth’s surface o Alter sunlight reaching earth’s surface o Destroying the ozone CFC (chlorofluorocarbon) Indoor air pollution o More polluted than outside air o Tobacco smoke, building materials, furniture, ovens, etc. etc. etc. o Combustion byproducts Carbon monoxide, nitrogen and sulfur oxides, VOCs, particulate matter Indoor burning, second h and smoke