answer: #Person2# tells #Person1# #Person2# considers the car price, size, and color. #Person2# also cares about the environment so #Person2# prefers a smaller engine and lower emissions. #Person1# tells #Person2# that environmentally-friendly cars are expensive.
documents: #Person1#: What are the key factors that you would consider when you want to buy a car?
  #Person2#: I guess the first thing is the price, the second is the size, and of course the color will play a role too. But I have to be honest. It is our today's responsibility to take care about our environment. Therefore, I will also pay attention to the fuel consumption of the car. You know, the rise in gasoline prices is huge. So I would rather to consider a smaller car with smaller engine. For which I can also save some tax. Last of the list, I also consider the safety. 
  #Person1#: What about the environmental factors? 
  #Person2#: Well, I do prefer the lower emission cars as long as it doesn't cost much. Some environmentally-friendly cars are really expensive. 
  #Person1#: Sure they are. Some hi-tech devices are built in to make sure they pollute less. Some of these green cars have not become standard. So the production costs are still high. But anyway, we should make efforts to start with.