In Addition to Increasing Atmospheric Levels of Carbon Dioxide,humans Are

Multiple Choice

In addition to increasing atmospheric levels of carbon dioxide,humans are negatively impacting coral reefs by_________ .

A) destroying large regions of coral reefs for commercial aquaculture
B) introducing alien species that are thought to be more productive
C) using large amounts of coral rock to pave roads and build houses
D) overharvesting fish and invertebrates that live in reef ecosystems