Question

Look at the graph in the figure and answer the question.

1. What does the graph show?
2. What does ppm mean?
3. Since which year has the increase been phenomenal?
4. Can you think of the reasons behind the increase in carbon dioxide?

Answer 1

1. The graph shows CO₂ concentration (ppm) and its increased level over the period of time from 1900 to 2017.
2. The abbreviation ppm means 'parts per million' of carbon concentration in the atmosphere.
3. After 1980, there has been a phenomenal increase observed.
4. The reasons behind the increase in carbon dioxide are due to the combustion of fossil fuels and large-scale deforestation.