Look at the chart and answer the questions. The trend chart of smog days in Hangzhou in recent years PM2.5 refers to the diameter less than 2.5 microns (which can enter the lungs).

(1) Environmental problems (or environmental pollution or air pollution).

(2) The picture shows that everyone is a victim of PM2.5, because smog weather is harmful to people's health. From the data analysis in the table, it is concluded that everyone is the manufacturer of PM2.5 because the number of days of haze weather is basically proportional to the number of cars, the consumption of raw coal, gasoline and diesel. The tail gas emitted by cars and the waste gas produced by burning raw coal, gasoline and diesel are the main culprits of smog weather.

(3)① Drive fewer private cars and advocate low-carbon travel. Forests can purify the air. ③ It is everyone's responsibility to protect the environment; Protecting the environment is a basic national policy; Man and nature live in harmony; China should implement the strategy of sustainable development and so on. (Give full marks for answering two points)