Writing as "choice"

 In Bill McKibben's podcast, McKibben discusses how the government is continuing to build everywhere in the world but there isn't enough funds or space. The world isn't what it used to be and everything is being depleted. If humans continue to misuse the world's resources, there will be nothing left to use. Now scientists will have to be able to make technology that will keep everything running. Humans will also have to start substituting the natural resources will technical resources. The substitution method can be used to develop new food sources, new living arrangments, new means of transportantion, etc.