Environmental Science
The blueness of the sky is mainly due to:

The scattering of sunlight by air molecules
Absorption of blue light by the air
Emission of blue light by the atmosphere
The presence of water vapor

ANSWER DOWNLOAD EXAMIANS APP

Environmental Science
What is the official name of IUCN?

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

ANSWER DOWNLOAD EXAMIANS APP