Environmental Science
"Ozone Hole" is a _____________

Destruction of ozone layer
Hole in the hydrosphere
Hole in the troposphere
Hole in the atmosphere

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Environmental Science
Which of the following statement is incorrect regarding ecological pyramids

The pyramid of numbers is upright in grass land ecosystem
The pyramid of biomass is upright in grass land ecosystem
The pyramid of energy is inverted in ocean ecosystem
The pyramid of biomass is inverted in aquatic ecosystem

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Environmental Science
Biogas is composed of

methane, carbon dioxide, nitrogen and sulphur
ethane, carbon dioxide, nitrogen and hydrogen
methane, carbon dioxide, nitrogen and hydrogen
carbon dioxide, nitrogen and hydrogen

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