Arrange the phases of life cycle analysis for information on environmental effects of products (from first to last):

The correct flow moves from Initiation to Inventory, then Impact, and finally Improvement.

Statement 2, Initiation, begins the study by defining the goal and scope.

Statement 1, Inventory, then compiles all inputs and outputs across the product's life.

Statement 3, Impact, assesses the environmental effects drawn from that inventory.

Statement 4, Improvement, comes last, suggesting ways to reduce the impacts found.

This four-stage method is the backbone of environmental Life Cycle Assessment.