Question 1 Why do you think the diagram uses double-headed arrows to represent the exchanges occurring within Earth's
subsystems?

In the late 1990s, brazil’s poor people protested about crowded cities land distribution mining permits industrial pollution

Which measure of humidity, relative humidity or dew point, best describes the actual quantity of water vapor in a mass of air

Which ecosystem best fits the characteristics listed below? which ecosystem best fits the characteristics listed below? ii. seasonal migrations of millions of wildebeests, zebras, and elephants iii. large numbers of predators, such as lions iv. acacia trees and grasses a. the congo rainforest b. the african mangroves c. the serengeti grasslands d. the sahel