How do human actions negatively impact ocean ecosystems? a. burning of fossil fuels increases the acidity of the oceans. b. increased tourism and daysailers disrupt the ocean environment. c. the ocean ecosystems are not impacted by human action. d. reducing carbon dioxide emissions threatens ecosystems and food supplies.

Extensive and unusual cold snaps have occurred here recently. is this evidence that global warming is lessening or not occurring? no—although the long-term trend is for warming, short-term weather patterns can still be variable. no—melting of glaciers and ice caps is making the oceans cooler, which can cause cold snaps. yes-- if global warming really were occurring, cold snaps wouldn’t happen. yes—due to global warming, weather patterns should be become less—not more—variable.