Environmental Science
What is the official name of IUCN?

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

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Environmental Science
The lag in daily temperature refers to the time lag between the:

Time of maximum solar radiation and the time of maximum temperature
Sunrise and sunset
Minimum and maximum temperature for a day
Time of minimum temperature and the time of maximum solar radiation
Minimum and maximum solar energy received at the surface for a given day

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