the table and bar chart below give information about travelling to work in Houston and Texas.

The table and the chart show the percentages and average ages of commuters in Houston, Texas, and how much CO2 they produce while commuting. According to the table, the greatest proportion of people who travel to work (48%) prefer to drive alone. By contrast, only 4% of the working population commute by cycling or walking. When we compare the average ages of these people, it is clear that people with the highest age average(, which is 47, ) go to work by public transport, namely trains and busses. The average age of this group is 47. The smallest age group is the cyclists and pedestrians, whose average is 37 years. The average age of car travellers are 43 and 44 for lone drivers and car-poolers, respectively. When we look at the bar graph under the light of this information, the most crowded group; that is, the lone drivers, are also those who cause the greatest amount of CO2 emissions, at around 0. 3 kg per person per km. Conversely, the youngest group causes the least damage to the environment with absolutely no CO2 emissions. Overall, car drivers with one person cause the highest CO2 emissions while the cyclists and walkers, the youngest group, produce the least.