1) The article discusses the degrading environment and the need for sustainable development as promoted by the green movement.
2) It notes that while environmentalists have brought awareness, the planet's health continues to decline at an unsustainable rate due to problems like deforestation and overfishing.
3) The author compares the ailing planet to a sick patient and argues that humanity must respect the Earth's processes and act as responsible stewards to preserve it for future generations.