The air pollution caused by the transport industry is an alarming situation globally.
Amongst all kinds of transport means, road transport is the largest contributor to global warming. Usage of petroleum, oil and fossil fuels for transportation emits various gases that concerns our environment.
Out of the six gases which are formally identified by the United Nations Framework Convention for Climate Change (UNFCCC) , three of them are related to the transport sector. They are – carbon dioxide, methane, and nitrous oxides. Emission of all three gases acts as a significant contributor to global warming.

There are various factors under transportation that determine the air pollution caused by it. Here are a few of them :
1. Excessive use of vehicle
2. Evolving technology
3. Poor maintenance of vehicles
4. Usage of substitute fuels instead of the ones set out by the Environment Board of a particular city/state.

Transport industry is one of the major contributors of producing greenhouse gases, especially in countries like the UK and the US.

Facts and Figures:

One of the reports from BBC states that –

The average petrol car on the road in the UK produces the equivalent of 180g of CO2 every kilometre, while a diesel car produces 173g of CO2/km.

In the US the average passenger vehicle on the road releases 650g of CO2/km. Generally, the larger the car, the higher the emissions.

CO2 emissions from passenger transport vary significantly depending on the transport mode. Passenger cars are a major polluter, accounting for 60.7% of total CO2 emissions from road transport.

With evolving technology, we surely have got many options to choose from on how we wish to travel for work or to the nearest stores for respective reasons.
The small decisions that we make on a day-to-day basis, actually determines the kind of climate we experience over a period of time.
Hence here are some options which can have a big impact if all of us do our bit towards it.

-Shift to fuel-less travel options like cycling or walking to your workplace or nearest grocery store whenever possible.
-Increase the use of public transport.
-Opting for sharing/pooling options while travelling with friends or family.