Band 7+: You should spend no more than 20 minutes on this task. The charts below show the parts per million of carbon dioxide in the atmosphere and the average temperature of four cities from the year 1750 to 2000. Write a report for a university lecturer describing the information. You should write at least 150 words.

The charts illustrate the average temperature in four cities and the levels of carbon dioxide in the atmosphere from 1750 to 2000. The four cities are, respectively, Seoul, New York City, London, and Los Angeles.

In the line chart, the per millions of carbon dioxide represents a slight growth from 1750 to 1900. The levels went up significantly after 1900 until 2000. The average temperatures in four cities also rise. In London, the temperature in 2000 is higher than the year 1750. Temperature in New York City did not have records until 1800, but it also shows an increasing trend. The record of Los Angeles began in 1850, and the level is the highest among 4 cities. As for temperature in Seoul, the record from 1900 to 2000, also has an upper trend.

In summary, there is an obvious correlation between average temperatures and levels of carbon dioxide, that they both increased in the 250-year period. This probably results from the greenhouse gas effect, which means that carbon dioxide can lead to the increase of Earth’s temperature.