There were such quotes as "One Earth, One Future" and "The nature lives when it is loved" which called people to action. These slogans are considered exemplary commencement for the further environmental activities since the main purpose of them are to raise population's awareness and make them more sensitive towards environmental issues. That is why IDEA chose public transportation, which is inseparable part of daily life, for promotion environmentally friendly behavior.
Thus, everybody should understand dreadful consequences of the environmental problems. Day by day, passing among thousands of people, these cabs call people to think about it.