Standard Science Primary 6 Interactions

Which of the following human activities is the primary cause of the increase in carbon dioxide levels leading to global warming?

A Burning of fossil fuels in factories
B Building more concrete roads
C Over-fishing in the oceans
D Excessive use of pesticides in farms
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Worked Solution

Step 1: Global warming is linked to the greenhouse effect caused by gases like CO2. Step 2: Combustion of fossil fuels (coal, oil, gas) releases stored carbon as CO2. Step 3: This is the largest human-driven source of atmospheric carbon dioxide.

Correct answer: Burning of fossil fuels in factories

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