Problem: - Chemicals from the acid rain kill plants and trees - The acid rainwater flows into rivers and streams - The chemicals kill fish - The chemicals kill animals that drink the water - Nitrogen builds up - Nitrogen destroys fish and shellfish populations. What might be the first step of the process?

A: Acid rain flows through soil

Problem: - Magma crystalizes - Lava cools on the surface - Lava crystalizes - Minerals dissolved in water crystlize. What might be the first step of the process?

A: Magma cools inside the crust

Problem: - The items are sorted - Trash is removed from everything else - Goes to a landfill - The items go into a baler machine for each kind of material - They come out as bales - The bales are shipped to manufacturers to use to make products. What might be the first step of the process?

A: Items are collected

Problem: - These substances rise into the high atmosphere - They react with water and oxygen - This creates a more acidic rain - The rain with the high acid content falls. What might be the first step of the process?

A:
Chemicals like sulfur dioxide and nitrogen are released into the air