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Abstract
Today, Environmental Pollution is becoming the most serious issue around the world, which leads to Global Warming. Along with that, pollution results in adverse health effects. As per the “Paris Agreement 2016” (UNFCCC), the earth’s temperature is getting raised by more than 20C every year. It happens due to the emission of chemicals such as Green House Gases (GHG), mostly CO2, in to the atmosphere. There are various sources from which these pollutants are being emitted. One of the major sources of these emissions is automobiles which run with Internal Combustion Engines. Mostly, the possible emissions from automobiles are CO, HC, NOx and Particulate Matter. There are various devices like Exhaust Gas Recirculation (EGR), Catalytic Converter, PCV Valve, Charcoal Canister etc, are used in an automobile to reduce these pollutants from the tail pile. The paper attempts to provide the brief review on the application of those methods and technologies to reduce emissions.