The statements discuss the complexity of environmental issues and the need for political solutions rather than technological ones to address the threat of environmental collapse. The discussion focuses on the various causes of biodiversity loss and ecosystem collapse, such as chemical pollutants, damming of rivers, and invasive species, and highlights that there is no single technological solution to address these issues. The suggestion is that we should consider moving towards stable-state economies, which preserve markets and competition while also recognizing the rights of future generations and other species and allowing for stronger environmental protections. Statements 1 and 2 both address the complexity and diverse nature of environmental issues. Statement 2 notes that while discourse often focuses on emissions, there are many other factors contributing to environmental collapse, including biodiversity loss and ecosystem collapse. Statement 1 then adds to this by outlining specific examples of diverse causes of environmental problems, including chemical pollutants, damming of rivers, and invasive species. Statements 4 and 3 offer suggestions to combat the issues highlighted in 2 and 1. Hence, the correct arrangement is 2143.