bad air breathed daily

Nowadays, seeing cars is as normal as seeing grasses and clouds. cars are the most basic transport for human especially city peoples. try to imagine if this world with no car exists, people will still be sitting horse cars, ox cars, rickshaws, dog sleds...and even pedal cars... i believe engine will be invented no matter what due to these inconveniences. well, what do modern cars really emits in our daily life? a point of fact, modern cars have two totally different personalities. one is friendly and attractive, the other one is destructive and lethal. how are cars so destructive? basically, gases produced by cars and emitted through car exhaust are poisonous and as mentioned, destructive. for instances, hydrocarbons, carbon monoxide, nitrogen oxide, particulates and sulphur dioxide.

Initially, hydrocarbons like unburned or half-burned fuel are a major contributor to urban smoke. It is toxic and will cause liver damage and even worst, cancer. Besides, hydrocarbons like methane, is also one of the greenhouse gases. It's environmental unfriendly and unhealthy for people as well. Secondly is the well-known gas which is carbon monoxide. Carbon monoxide is also a product of incomplete combustion. Inhaling carbon monoxide will cause the reduction to the ability of blood to carry oxygen. It will compete with oxygen to bind with a air transport mechanism in blood called haemoglobin. Overexposure may be fatal.

Besides that, when nitrogen in the air reacts with oxygen is a high temperature and pressure inside the engine, nitrogen oxides will be generated. It is a precursor to smog and acid rain. Nitrogen oxides will also destroy the resistance to respiratory infection. Especially delivery trucks, hot exhaust they blew containing life threatening amount of nitrogen oxides into the atmosphere. Particulate like soot or smoke that made up of particles in micrometre size range can cause respiratory health effects in both human and animals. Lastly, the sulphur oxides that emitted from motor vehicles burning fuel contain high concentration of sulphur.

Condition is getting worst due to the increasing of human population on earth. People keep purchasing cars without considering all these problems. However, it isn't too late to save ourselves. We could start carpooling from today onwards, take public transports, install catalytic converter on every single car and so on. I am afraid that we might have to wear poison gas mask around after 50 years later. Let's prevent this from happening!