Carbon dioxide is one of the important green house gases. — Qualitative and Quantitative Analysis Chemistry Question

💡 Solution & Explanation

Step 1: The term "noosphere" represents the sphere of human thought or the mental/rational layer of the Earth. Step 2: It is often associated with the concept of the biosphere modified by human intellect and activity, thus serving as a synonym for the human environment in a broader sense. Step 3: Therefore, the synonym for noosphere among the options is environment, corresponding to option (a).