photosynthesis , Photosynthesis is the fundamental biological process by which green plants, algae, and some bacteria convert light energy, usually from the Sun, into chemical energy (sugars/glucose)., bio gas, Biogas is a renewable fuel produced from the breakdown of organic matter (like food scraps, animal waste, and sewage) by microorganisms in the absence of oxygen, a process called anaerobic digestion., environment , Environment" generally refers to everything that surrounds us,.

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