What measures help protect the environment?

You answered correctly. Using low-resistance tyres and low viscosity engine oil both help protect the environment. Low-resistance tyres reduce rolling friction, which lowers fuel consumption and therefore decreases CO₂ emissions. Low viscosity engine oil reduces engine friction, also contributing to better fuel efficiency and fewer emissions. Air-conditioning systems, however, generally increase fuel consumption and are not considered environmentally friendly. When answering questions about environmentally friendly measures, focus on those that directly reduce fuel use and emissions.