Weather charts and maps are still plotted and analyzed entirely ...

[penza]

Weather charts and maps are still plotted and analyzed entirely by hand.
  Indicate whether the statement is true or false

Question 2

Primary air pollutants ____, whereas secondary pollutants _____.
 A) enter the atmosphere directly; form by chemical actions involving other pollutants
  B) form through a series of chemical reactions; occur naturally
  C) occur naturally; are synthetic
  D) enter the atmosphere directly; enter the atmosphere through human intervention

[honnalora]

Answer to Question 1

False

Answer to Question 2

A

[penza]

Gracias!

[laurnthompson]

Excellent