Have you ever stepped outside and looked up at the sky on a clear, summer day and noticed something swimming in your field of vision? Little transparent worms or blobs that seem to disappear whenever you try and get a closer look at them, only to reappear as soon as you shift your glance.
पूर्व के कुछ वर्षों में दिल्ली एवं मुंबई के वातावरण में मीथेन के स्तर में वृद्धि इंगित करता छायाचित्र।
श्रेय: अध्ययन लेखक