2. How aggressive they may be The EGR system routes a few of the exhaust gases (6 ? 10%) through the EGR valve, back in towards the Intake System, and ultimately within the combustion chamber. The exhaust gases are inert i.e. they do not burn in the combustion chamber; also, the exhaust gases undertake a few of the space which may preferably be taken with the intake air. This reduces the quantity of intake air available for the combustion process during each Power Stroke; which decreases the peak combustion temperatures. This results in lower NOx emissions. While art is rampant across Cairo's galleries, rarely does an exhibition find a way to take our breath away. 'Beauty and also the Beast' ? a dual exhibition of 'The Beast' from Sabhan Adham, and 'Beauty' from Hossam Dirar ? is a illustration showing jaw-dropping talent, perfectly intertwined at Zamalek's Art Talks.