1. The problem statement, all variables and given/known data Consider the feedback loop involving Clouds, Rainfall and forest area. All the relationships represented in this figure show positive couplings between the components: Forest area is positively coupled to rainfall, plant evapotranspiration is positively coupled to forest area, and rainfall is positively coupled to plant evapotranspiration. Is this a positive or negative feedback loop 2. Relevant equations Forest Area-> Plant evapotranspiration and rain cloud formation Plant evapotranspiration and rain cloud formation->Rainfall Rainfall->Forest Area 3. The attempt at a solution I don't actually understand that loop because I cant see the invariant. In my class we are analyzing how those feedbacks influence the variation of the temperature. In this case, I cant see the invariant or I dont know if this loop is related to the temperature. Can someone explain me how this loop works?