The correct answer is Option 4: Only 2
Explanation:
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Statement 1: "It is a gradual decrease in the average temperature of the earth which is why we experience colder winters now a days." This is incorrect. Global warming refers to a gradual increase in the Earth's average temperature, not a decrease.
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Statement 2: "The increase in greenhouse gases can be observed since industrial revolution took place." This is true. The industrial revolution marked a significant increase in greenhouse gas emissions due to industrial activities, which has contributed to global warming.
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Statement 3: "Much of the recent observed and projected global warming is natural." This is not true. The recent observed and projected global warming is attributed to human activities, such as the burning of fossil fuels and deforestation.
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