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.
Africa's democratic transition is back in the spotlight. The concern is no longer the stranglehold of autocrats, but the hijacking of the democratic process by tribal politics. Kenya's 2007-08 post-election violence revealed the extent to which tribal forces could quickly bring a country to the brink of civil war. The challenge to democracy in Africa is not the prevalence of ethnic diversity, but the use of identity politics to promote narrow tribal interests. It is tribalism.