Citizens in receive 1.4 years of education on average.
Citizens in
earn $906 annually on average.
This chart suggests that countries with a short life
expectancy and low income have a HDI
ranking

Explain why components that are naturally found in air can be considered air pollutants.

Match the letters with the correct terms

Dubai is challenged by all of the following environmental factors except a. a warm and dry climate b. a lack of annual rainfall c. scarce freshwater resources d. a lack of valuable natural resources