In addition to global climate change, humans are negatively impacting coral reefs by
A) destructive methods of harvesting of fish for food.
B) using large amounts of coral rock to pave roads.
C) destroying large regions of coral reefs for commercial aquaculture.
D) introducing alien species that are thought to be more productive.
Question 2
Ozone levels can increase in the troposphere when
A) VOCs and nitrogen oxide are present.
B) PANs react with atmospheric nitrogen to form ozone.
C) VOCs release ozone upon being broken by solar energy.
D) more carbon dioxide is available to contribute additional oxygen for ozone formation.