Toyota's Prius continues to rake in the accolades and has now been ranked most environment-friendly car in Germany, according to German-based VCD. The award takes into account CO2 emissions, particulate matter and NOx, noise levels, and impact on nature. Toyota's Aygo (1-litre) was ranked fourth while Toyota was ranked the most environment-friendly car manufacturer for the second time. VCD is an independent organisation promoting sustainable mobility.