I am going to show you why it is suicidal to think we can keep growing forever. Let me give you a test tube full of food for bacteria, that represents our world. I am going to put one bacterial cell into that test tube (representing us), and it is going to divide every minute; that is exponential growth. So at time zero you have one cell; one minute you have two; two minutes you have four; three minutes you have eight; four minutes you have 16. That is exponential growth and at 60 minutes the test tube is completely full of bacteria and there is no food left, a sixty minute cycle.
When is the test tube only half full? Well the answer of course is at 59 minutes; but a minute later it is filled. So at 58 minutes it is 25% full; 57 minutes 12½ % full. At 55 minutes of the 60 minute cycle it is only 3% full. So, if at 55 minutes one of the bacteria said to its companions that they had a population problem, the other bacteria would be incredulous because 97% of the test tube would be empty and they had been around for 55 minutes. Yet they would have only 5 minutes left. So bacteria are no smarter than humans and at 59 minutes they realize they only have a minute left. So they give massive amounts of money to scientists, and in less than a minute those bacterial scientists invent three test tubes full of food. That would be like adding three more planets for our use. So it would seem that they (and we) would be saved.
What actually happens is this - at 60 minutes the first tube is full; at 61 minutes the second is full; and at 62 minutes all four are full. By quadrupling the amount of food and space, you buy two extra minutes! How do we add even a fraction of 1% more of air, water, soil or biodiversity? We cannot. The biosphere is fixed and finite and every biologist I have talked to agrees with me, we are past the 59th minute. So all those leaders saying that we have to keep the economy growing are saying we have to accelerate down what is a suicidal path.