The presented table and bar chart illustrate the relationship between the most popular modes of transport chosen for traveling to work in Houston, Texas, and the CO2 emissions that they create.
It is important to say that the percentages of people who use modes of transport are very different : for example, most respondents prefer a car, driving it alone (48%). The second most popular mode of transport chosen for travelling to work among Houston residents is a train or bus – 37% of respondents choose it. The penultimate position is occupied by a car that accommodates more than 1 person, it is chosen by 11%. And the least common mode of transportation among the respondents is cycling or walking to get to work – only 4% of people use it.
As for the average age of people traveling by every mode of transport, they are also a little different. The largest group – people who use public transport – the average age of them is 47 years. Next is a group of 44-year-old respondents who use a car with more than 1 person. People who drive alone have an average age of 43, while the youngest and at the same time the smallest group are the respondents aged 39 who choose cycling or walking.
It is worth mentioning that almost all of these modes of transport pollute the environment. The only clean options are walking or cycling which do not cause CO2 emissions. The second most safe way to get to work is to use a bus or a train, because they emit less than 0.05 CO2. The third slightly more polluting transport is a car with more than 1 person – it pollutes the air with carbon dioxide by approximately 0.08 units. And, of course, the dirtiest mode of transport is a car with 1 person. Its CO2 emissions are off the charts – more than 0.3 kg/km.
So, in general, driver-only cars are the most common means of transportation to get to work in Houston, and they cause more pollution than all other vehicles taken together.