Part D Today, coral reefs cover approximately 284,300 square kilometers, Corals depend on calcium carbonate to build their
skeletons. Some scientists predict that by 2050, only 15% of coral reefs will have sufficient levels of calcium carbonate
required for growth. By these estimates, how many square kilometers of coral reefs will be damaged by low calcium
carbonate levels? Show your calculations,

Eastern europe and parts of northern europe have which of the following climates?

Alow pressure system is formed when an air mass cools over a cool surface and sinks. true or false

Although china’s total economic output, measured by gross domestic product (gdp), is third largest in the world, it is considered a developing nation. what is most likely the most important factor for this designation? a. china’s government spends money on things that do not benefit human development. b. china has a large population, so its gdp per person is only modest. c. china has a strong economy but weak literacy and school attendance rates. d. china’s high rates of disease offset the country's economic gains.