Rain containing sulfuric and nitric acids.

Loss of forests

Splitting of land into small sections

Practice of farming

Resource that can regenerate quickly and that is replaceable

Number of different species in the biosphere

Plants and animals that have migrated to places where they are not native

Increase in the average temperatures on Earth

Using natural resources at a rate that does not deplete them

Species whose population size is rapidly declining and will become extinct if the trend continues.

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