Chapter 3, Problem 10CR

To determine

The key concept of Section 3.5. The three ways in which scientists study ecosystems. The need for more basic data about the condition of the world’s ecosystems. The difference between the Holocene era and proposed Anthropocene era. The definition of a planetary boundary and the reason why such boundaries are important. Four boundaries that might have exceeded. The three big ideas dealt in Chapter 3. The way in which the tropical rain forests showcase the functioning of the three scientific principles of sustainability.