geological survey, to have fun. each time i found a lot of people riding bicycles to their offices. among the cyclists, an old man with white hair attracted my attention. curiously, i asked my father," why does the old man ride his bike to work every day? doesn't he have enough money to buy a car?" father laughed, "no, not because of money. actually, he is one of the greatest scientists in the world. he can afford to buy a motorcade if he likes. he is just an environmentalist and usually doesn't drive unless going shopping, or in bad weather. in america, there are a lot of environmentalists, who actively protect their environment. for example, in palo alto city we are living now, there is even a bicycle-to-work day on may 19th every year to encourage people to decrease air pollution caused by cars".
later, i also learnt another interesting fact of environment protection there. in some states of america, in order to decrease air pollution, save energy and reduce traffic jams, state governments encourage people to take buses to work or to share a car among several people. they even set special "diamond lanes" in some main streets, which are only for the vehicles with 2 or more people.
the positive actions of american people and the effective measures the american government takes in environment protection fully won my respects and deeply affected my consciousness in environment protection.
when i was back in china, people often asked me: " what do you