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Who am I?
(Note: write only one letter in each box.)
1. The abundant atmospheric gas is released back to the atmosphere by this biogeochemical cycle. I am the last stage in this cycle. Who am I?
2. I am the gas that is colourless, odourless gas and released during complete combustion. I pollute the environment and causes drastic climatic and temperature changes. I am also called as the greenhouse gases. Who am I?
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