The EGR (Exhaust Gas Recirculation) valve helps lower the carâs exhaust emissions (gases from the tailpipe). It recirculates the portion of the gasses coming out of the engine by putting in back into the intake manifold, where the engine can burn it again, thereby reducing the emissions.he EGR (Exhaust Gas Recirculation) valve helps lower the carâs exhaust emissions (gases from the tailpipe). It recirculates the portion of the gasses coming out of the engine by putting in back into the intake manifold, where the engine can burn it again, thereby reducing the emissions.
Indeed The Failure of Popular Sovereignty ofÃ­ ers a novel interpretation of the role of slavery in territorial expansion. Popular sovereignty, the author argues, became the South's true manifest destiny. The great strength of this work is its narrative.
Popular sovereignty in 19 th century America emerged as a compromise strategy for determining whether a Western territory would permit or prohibit slavery. First promoted in the 1840s in response to debates over western expansion, popular sovereignty argued that in a democracy, residents of a territory, and not the federal government, should be allowed to decide on slavery within their borders.