Which conduct shows awareness of the environment?

The selected combination is correct because each of the options demonstrates an awareness of the environment and contributes to reducing the ecological impact of transportation.

1. Using public transport at collective parking areas (P + R) reduces the number of cars on the road, which helps decrease traffic congestion and emissions.
2. The formation of car pools allows multiple passengers to share a ride, further minimizing the number of vehicles on the road, leading to lower fuel consumption and emissions.
3. Switching off the engine in a traffic jam is an environmentally friendly practice that prevents unnecessary fuel consumption and reduces air pollution.

All these practices align with the goals of sustainable transportation advocated by German traffic regulations, emphasizing the importance of reducing pollution and conserving resources. By recognizing and applying these methods, drivers contribute to a cleaner and healthier environment.