The bar chart illustrates the amount of **CO₂ emissions per passenger kilometer** produced by different forms of transport in the European Union. The transport types shown are passenger cars, buses, coaches, maritime transport, rail, and air travel.
Overall, **air transport produces by far the highest level of CO₂ emissions**, while **coaches produce the lowest emissions**. Passenger cars also generate a relatively high level of pollution compared with most other transport options.
Air travel produces around **380 grams of CO₂ per passenger kilometer**, which is significantly higher than all other forms of transport. Passenger cars are the second-largest source, producing approximately **130 grams**. Buses emit around **70 grams**, which is almost half the amount produced by cars. Maritime transport and rail produce similar levels, roughly **50 grams** and **45 grams** respectively. Coaches are the most environmentally friendly option, emitting only **about 40 grams** of CO₂ per passenger kilometer.
These figures suggest that **public transportation such as buses, coaches, and railways is much more environmentally friendly than private cars or air travel**. For example, many European governments encourage people to use trains or buses because they reduce traffic congestion and carbon emissions.
In conclusion, the data clearly shows that **air travel and private cars have the greatest environmental impact**, while shared public transport systems are more sustainable.
