Question

which plant wastes are useful to human eiseful to human beings ?
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Answer 1

Answer:

oxygen is most useful for human beings

Explanation:

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Answer 2

Answer:

Oxygen is the most useful of plants and it is essential for life on earth.

Explanation:

Oxygen is the most useful excretory of plants and is essential for life on earth. Oxygen is produced through the process of photosynthesis, in which plants use carbon dioxide and water (in the presence of sunlight) to produce oxygen and glucose.

The leaves and bark of plants also store waste and are shed periodically. These leaves and barks and other plant products/waste are converted into manure and used in agriculture and horticulture.

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