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The EGR system routes a number of the exhaust gases (6 ? 10%) through the EGR valve, back in for the Intake System, and finally inside combustion chamber. The exhaust gases are inert i.e. they do not burn inside the combustion chamber; also, the exhaust gases occupy a few of the space which may otherwise be taken from the intake air. This cuts down on level of intake air readily available for the combustion process during each Power Stroke; which often decreases the peak combustion temperatures. This ends in lower NOx emissions. French Spiderman Alain Robert has finished his latest climbing the tallest building on earth. Alain has successfully reached the top from the tapered spire across the 160th floor with the building. The 47-year-old is known for climbing buildings around the world just using bare hands and climbing shoes. 9. Their emotional appeal