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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. SEO in India is gaining a timely popularity with the increasing variety of internet sites. The term SEO means ?Search Engine Optimization? that is a tool employed to help the visibility of the website. SEO helps websites to raise the degree of potential traffic and find maximum variety of potential clients. Therefore, search engine optimization is an essential tool for every business online so it helps it to reach out to customers and make growing.