please explain and slove

Economics Please do explain! Thank you. 19. The world government now publishes world economic accounts that estimate not merely depreciation of the stock of physical capital but also of the stock of environmental capital. (a) If pollution and climate change are causing adverse effects, how does your new diagram on world income and output differ from that in question 9? (b) Suppose environmental depreciation was initially $500hn and the world government spends $100bn on pollution control with the consequence that environment depreciation is now only $300bn. How is your diagram now affected