Environmental Science
The atmospheric greenhouse effect is produced mainly by the:

Absorption and re-emission of visible light by the ground
Absorption and re-emission of ultraviolet radiation by the atmosphere
Absorption and re-emission of infrared radiation by the atmosphere
Absorption and re-emission of visible light by the atmosphere
Absorption and re-emission of visible light by clouds

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Environmental Science
What is the official name of IUCN?

International Union for Conservation of Nature and Natural Resources
United Nations Educational, Scientific and Cultural Organization
World Wide Fund for Nature
United Nations Environment Programme

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Environmental Science
Infrared and visible satellite images might provide:

A way of identifying clouds suitable for cloud seeding.
A way of distinguishing between "new" and "old" clouds.
A way of distinguishing between wet and dry clouds.
A way of determining cloud thickness and altitude.

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