Author Question: In central Iowa, which one of the following would yield the highest UV exposure on a sunny day, with ... (Read 56 times)

cherise1989 · **on:** Jul 16, 2018

In central Iowa, which one of the following would yield the highest UV exposure on a sunny day, with a sky clear of all clouds and apparent pollution? Thirty minutes of direct exposure to the sun

A) at 1:00 PM on June 30.
B) at 3:00 PM on September 30.
C) at 9:00 AM on December 1.
D) at 2:00 PM on March 30.

Question 2

In a significant 2004 paper reviewing 69 studies on world human population and carrying capacity, the authors estimated that the sustainable carrying capacity of humans for Earth is about

A) 600 million.
B) 2.5 billion.
C) 7.7 billion.
D) 20 billion.