1. Weight and Size: Trucks are generally heavier and larger than cars, requiring more energy to move and accelerate. This increased mass results in higher fuel consumption and CO2 emissions.
2. Aerodynamics: Trucks often have less aerodynamic designs than cars. Their boxy shape and larger frontal area create more drag, which leads to increased fuel consumption and CO2 emissions.
3. Engine Power: Trucks often have more powerful engines than cars to cope with their heavier loads and towing capabilities. These more potent engines typically burn more fuel and emit more CO2.
4. Idle Time: Trucks, especially those used for commercial purposes, often spend more time idling than cars. Idling engines continue to consume fuel and emit CO2 even when not in motion, contributing to higher overall emissions.
5. Load and Towing: When carrying heavy loads or towing trailers, trucks require additional energy and fuel to move the increased weight. This results in higher fuel consumption and CO2 emissions.
While trucks with the same engine size as cars may have similar base emissions, the factors mentioned above usually lead to higher CO2 emissions in trucks compared to cars. However, it's worth noting that modern vehicles, including trucks, are becoming more fuel-efficient thanks to advancements in engine technology, aerodynamics, and hybrid/electric powertrains.