rainfall
frequent algal blooms d. little or no vegetation 12. Which of the following is an example of a weather event? a. The hurricane season lasts from June 1 through November 30. The amount of atmospheric CO2 has steadily increased during the last century. A windstorm blew down trees in the Boundary Waters Canoe Area in Minnesota on July 4, 1999. Deserts are generally dry ecosystems having very little rainfall. Which of the following natural forces is responsible for the release of carbon dioxide and other atmospheric gases? a. the Milankovitch cycles b. volcanoes c. solar intensity d. burning of fossil fuels.