Assistant Lecturer Abdulrahman Shaker Mahmoud delivered a lecture entitled "The Effect of exhaust of internal combustion engines on air pollution" on Wednesday, 20/3/2019. The lecture summarized the following:

The increase in the use of transportation means from planes, ships, trains and cars have significantly contributed to the human’s service of facilitating the movement, transition and utilization of time. However, this important development has led to the emergence of many problems and negative consequences on human health and on every living organisms and the environment, as a result of pollution from these means especially exhaust emissions of engines.

Internal combustion engines of various types and uses are considered a major source cannot be underestimated in the air pollution field, because of these engines produce harmful emissions that have negative effects on humans and other living organisms. The most important of these emissions are nitrogen oxides (NO_X), carbon monoxide (CO), carbon dioxide (CO₂), unburned hydrocarbons (HC) and smoke. Also, the most important of environmental effects to the fuel combustion products are a global warming phenomenon and acid rain, which lead to the elimination of biodiversity and cause many diseases in humans.

So, should search for ways to help in reducing these emissions while maintaining on the engine performance. There are several ways to reduce exhaust emissions including: changing some engine parameters such as compression ratio, exhaust gas recirculation, injection timing and injection pressure. Biodiesel fuel can also be used in different proportions and it’s blended with pure diesel fuel, as well as the addition of some chemicals to the fuel, all help to reducing emissions and thus reduces air pollution.