41. Plants which grow in shade are called
42. Plants which grow in light are called
43. What is the man-made greenhouse gas known as?
44. Which of the following is not a green house gas?
45. The gas responsible for the greenhouse effect on Venus is:
46. Which of the following gases are mainly responsible for the atmospheric greenhouse effect in the earth's atmosphere?
47. The combination of nitrogen oxides and hydrocarbons in the presence of the sunlight causes
48. The Residential and Commercial wastes mainly consist of:
49. What is the only continent on earth where Giraffes live in the wild?
50. Grassland of USA is referred to as
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