Which of the following activities has contributed maximally to global warming?

AIndustrial processes

BDeforestation

CAgriculture

DFossil fuel combustion ✓ Correct

Correct answer: (D) Fossil fuel combustion

Explanation

Fossil fuel combustion has contributed the most to global warming.

Industrial processes add greenhouse gases but less than burning fossil fuels overall.

Deforestation removes carbon sinks yet ranks below fossil fuel burning.

Agriculture releases methane and nitrous oxide but is not the leading single source.

Burning coal, oil and gas releases the bulk of human made carbon dioxide.

This carbon dioxide is the dominant long lived driver of the enhanced greenhouse effect.

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