There are still many factories that have some controlled units (yellow) or do not have any controlled units (red). Only about half of the factories shown on the map have full controls (green). Therefore, more work needs to be done by the
EPA and factories to effectively control air pollution.
Part D
The average emission rates in the United States from burning coal are 13 lb/MWh (pounds per megawatt hour) of SO2 and
6 lb/MWh of NOx. (A pound is a unit of mass, and a megawatt hour is a unit of energy.) Imagine that a scientist developed
a new emission control device that can cut each of these emissions to 35% of the current output. If the device were
installed, what would the average emission rates change to?
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c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.