"Soil health is a linchpin" as it is used in paragraph 19 means having healthy soil plays a vital role in sustainability.
What is the meaning of sustainability?
It means "avoidance of the depletion of natural resources in order to maintain an ecological balance".
"Soil health is a linchpin" as it is used in paragraph 19 means having healthy soil plays a vital role in sustainability because the paragraph talks about how the health of soil is crucial for the sustainability goals as it will provide good quality water and food.
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