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The EGR system routes a number of the exhaust gases (6 ? 10%) from the EGR valve, last on the Intake System, and ultimately within the combustion chamber. The exhaust gases are inert i.e. they cannot burn in the combustion chamber; also, the exhaust gases take up a number of the space which would preferably be taken with the intake air. This reduces the volume of intake air readily available for the combustion process during each Power Stroke; which in turn decreases the peak combustion temperatures. This brings about lower NOx emissions. Sleep disturbances The main objective of the what are known as IR35 legislation is usually to prevent contractors using the tax benefits associated with operating through their very own personal company. This means people working via limited companies would be be subject to the same degrees of tax as 'normal employees', with the appropriate levels of taxes & national insurance. 6. The use of smaller words and shorter sentences