ch17_lecture new - La Habra High School
... • When the nitrogen dioxide (NO2) concentration is well above clean air levels and
there is plenty of sunlight, then an oxygen atom splits off from the nitrogen dioxide
Environmental Chemistry part 4
... up; this makes warm and less dense air rise taking pollutants
with it. The warmer air is replaced by cooler air which is again
warmed up continuing the process;
... Several different processes remove particulates from the air.
Gravitational settling, the process wherein they fall from
the air, effectively removes larger particulates.
Scavenging is the process in which falling precipitation
collides with particulates and carries them to the surface.
environmental chemistry HL smog
... warmer air so that a layer of warm air is trapped between 2
layers of cool air. The bottom cool layer of air, which is
denser than the warm layer of air above it, remains close to the
surface. Any pollutants released in that layer of cooler air stay
close to the Earth’s surface; this allows the prim ...
Ch 15 Air Pollution Content Page
... In the mid 1970’s, Sherwood Rowland and Mario Molina predicted a thinning of the
stratospheric ozone layer over Antarctica. The thinning was confirmed in the last
twentieth century and has continued into the twenty-first century.
(A) Identify the class of chemical compounds that is primarily respons ...
Air pollution - WordPress.com
... The NO in the atmosphere can be converted to NO2 and
will be a brownish color. This is why in come large cities
the overcast is sometimes a brown color – known as
... • Source: Mainly automobile pollution
• Contains: Nitrogen Oxides, Ozone, Alkanals,
Peroxyacyl Nitrates (PANs), plus hundreds of other
• Effects: PANs cause eyes to water and can damage
plants, O3 irritates eyes and deteriorates rubber and
plants, NOx causes acid rain.
• First observed in ...
California Smog Check Program
The California Smog Check Program requires vehicles that were manufactured in 1976 or later to participate in the biennial (every two years) smog check program in participating counties. The program’s stated aim is to reduce air pollution from vehicles by ensuring that cars with excessive emissions are repaired in accordance with federal and state guidelines. With some exceptions, gas-powered vehicles that are six years old or newer are not required to participate; instead, these vehicles pay a smog abatement fee for the first 6 years in place of being required to pass a smog check. The six-year exception does not apply to nonresident (previously registered out-of-state) vehicles being registered in California for the first time, diesel vehicles 1998 model or newer and weighing 14,000 lbs or less, or specially constructed vehicles 1976 and newer. The program is a joint effort between the California Air Resources Board, the California Bureau of Automotive Repair, and the California Department of Motor Vehicles.A Smog Check is not required for electric, diesel powered manufactured before 1998 or weighing over 14,000 lbs, trailers, motorcycles, or gasoline powered vehicles 1975 or older. In April 2015, hybrid vehicles became subject to smog check requirements.Although vehicles 1975 and older are not required to get a smog check, owners of these vehicles must still ensure that their emissions systems are intact.Anyone wishing to sell a vehicle that is over four years old must first have a smog check performed. It is the seller’s responsibility to get the smog certificate prior to the sale. If the vehicle is registered in California and was acquired from a spouse, domestic partner, sibling, child, parent, grandparent, or grandchild it is exempt.