Which sequence describes effects of deforestation (biosphere) leading to consequent changes in the atmosphere, hydrosphere, and geosphere?
Deforestation increases carbon dioxide, causes soil erosion, and changes water flow patterns.
The Earth's spheres are linked, so a change in the biosphere (loss of forests) produces changes in the atmosphere, hydrosphere and geosphere.
Atmosphere: trees absorb carbon dioxide for photosynthesis and store carbon. Cutting and burning them reduces this absorption and releases stored carbon, so carbon dioxide in the air increases.
Geosphere: tree roots bind the soil and leaf cover breaks the force of rain. Without them, the topsoil is washed or blown away, causing soil erosion.
Hydrosphere: forests slow run-off, help water soak into the ground and return water vapour through transpiration. Their removal changes how water flows over land and into rivers, causing faster run-off, flooding and silting.
Statements saying deforestation leaves air or water unaffected, or only affects habitats and food, ignore these links, so only the statement covering all three spheres is correct.
Hence, Deforestation increases carbon dioxide, causes soil erosion, and changes water flow patterns.
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