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However, it's not all good news for those those who are always researching the future searching for the subsequent best thing rather than experiencing and enjoying the present. Although it doesn't appear to have the same negative effects on his or her health as the those who are constantly looking back, they will often stop as content given that they overlook what they've and take enogh time and energy to take advantage of the present. Because of this they too are apt to have a reduced standard of living. 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.