Q. Higher CO₂ concentration stimulates:

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Q. According to experimental research, grain and forage quality reduces, with an increased CO₂ concentration at:

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Q. Increase CO₂ concentration enabling plants to fix carbon at a:

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Q. In mid of 1960s and 1980s, global food production increased by:

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Q. Rice requires a large amount of

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Q. In Peru, climate is strongly influenced by

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Q. In a period of low rainfall, cotton is capable of yielding greater

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Q. What is an annual rate of grain production?

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Q. What is main source of employment in developing countries?

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Q. Wheat, rice and soya bean belongs to

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Q. Cotton' has deeper

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Q. Maize, sorghum, sugar-cane, millet and many pasture and forage grasses are:

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Q. In glasshouses additional CO₂ is introduced artificially to increase

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Q. In 1982-3 Elno events, agricultural production dropped by

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Q. One degree Celsius of persistent warming causing bleching to

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Q. "Tropical forests" are like:

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Q. Desert sand reflects up to:

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Q. Evaporation occurs through:

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Q. 30% of world's land is consist of:

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Q. Eighty percent of terrestrial 'carbon' is in:

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