The chart shows the average daily minimum and maximum levels of air pollutants in 4 cities 2000.

Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

Write at least 150 words 

Review question 1:

By what you learned today, describe any number in the following bar graph:

Example: The maximum level of SO2 in Los Angeles was only 10 micrograms, making it one of the least polluted cities.

Review question 2:

By what you learned today, combine the following sentences into one complex sentence:

1. 82% of total electricity in India was produced from fossil fuel. Fossil fuel was the most important source of energy in India
2. 207 micrograms and 200 micrograms of SO2 and N2O was respectively emitted in the atmosphere of Mexico City. Mexico City was the most polluted city
3. 170.000 pounds was spent on photographic films. This is the biggest expenditure in the Britain.
4. Over 8 billion dollars was spent on Health Research. This is the most expensive area in the US.