Environmental Science
MAB stands for

Man, antibiotics and bacteria
Man and biotic community
Mayer, Anderson and Bisby
Man and biosphere

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Environmental Science
The aurora is produced by:

Burning oxygen caused by the intense sunlight at high altitude
Fast-moving charged particles colliding with air molecules
The combination of molecular and atomic oxygen to form ozone
Reflections of sunlight by polar ice fields
Scattering of sunlight in the upper atmosphere

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