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Energy
Environment
11
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8
Physics
6
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6
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5
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5
Force
4
Biofuels
3
Engineering
3
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3
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3
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3
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3
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3
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3
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2
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2
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2
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2
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2
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2
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2
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2
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2
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2
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2
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2
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2
India
2
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