In general, most ecosystems in the world have A) remained ...

[elizabeth18]

In general, most ecosystems in the world have
 
  A) remained relatively unchanged for millions of years.
  B) been impacted by human activities.
  C) experienced increased ecosystem capital because of human activities.
  D) already been significantly harmed by global climate change.

Question 2

If any component of the atmosphere causes an increase in the retention of energy, it
 
  A) will leave the planetary albedo unaffected.
  B) has a positive value of radiative forcing.
  C) has a negative value of radiative forcing.
  D) will help mitigate global warming.

[sabina576]

Answer to Question 1

B

Answer to Question 2

B

[elizabeth18]

Excellent

[olderstudent]

Thanks for the timely response, appreciate it