What is the missing first step of the following process: - Chemical compounds rise into the air - Chemical compounds mix with elements in clouds - The affected rain falls to the earth - The affected rain can harm natural and man-made objects because of its acidic content.
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Answer: Human industry produces chemical compounds

Q: What is the missing first step of the following process: - The cans are transported to a facility - The cans are shredded by a machine - The cans are heated to 1400 degrees to melt them - The molten metal is poured into molds - The molds are flattened and rolled into sheets to reuse.
A: Put the aluminum can into a recycle bin

Question: What is the missing first step of the following process: - Cells with chlorophyll in them capture the light energy - Plants absorb carbon dioxide through their stoma - Plants absorb water through their roots and other parts of themselves - Plants absorb minerals through their roots - Plants convert these inputs into sugars - Sugars can be used as energy sources - Oxygen and water are also produced - Excess water and oxygen are released through stoma and other parts of the plant.
Answer: Sunlight shines on plants

[Q]: What is the missing first step of the following process: - The matter forms on the sea floor - Layers of sediment form above the matter compressing it - After many years the matter is compressed and heated - The result is that crude oil forms.
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[A]: Living organisms in the sea die

input: Please answer the following: What is the missing first step of the following process: - Waste enters the kidneys - A processing moment in the kidneys let waste and fluid pass - Prevents larger molecules to pass - Fluid goes back to the bloodstream - Bad waste is removed - The final product is turned into urine.
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output: Fluid

What is the missing first step of the following process: - Air goes through all the little branches in your lungs to fill up the air sacs, or alveoli - Oxygen goes through the walls of the alveoli and into the capillaries - The oxygen goes into the bloodstream - Oxygen is left and carbon dioxide is picked up - You breathe it out through your lungs -
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Answer:
You breathe in