What does this graph show?, What does ppm mean?

Question

Look at the graph and answer the questions:

1.What does this 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 CO 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.Since which year has the increase been phenomenal?

4. The reasons behind the increase in carbon dioxide is due to combustion of fossil fuels and large- scale deforestation.