“We're at a crucial point in history. We cannot have fast cars, computers the size of credit cards, and modern conveniences, whilst simultaneously having clean air, abundant rainforests, fresh drinking water and a stable climate. This generation can have one or the other but not both. Humanity must make a choice. Both have an opportunity cost. Gadgetry or nature? Pick the wrong one and the next generations may have neither.”

“We're at a crucial point in history. We cannot have fast cars, computers the size of credit cards, and modern conveniences, whilst simultaneously having clean air, abundant rainforests, fresh drinking water and a stable climate. This generation can have one or the other but not both. Humanity must make a choice. Both have an opportunity cost. Gadgetry or nature? Pick the wrong one and the next generations may have neither.”

“We're at a crucial point in history. We cannot have fast cars, computers the size of credit cards, and modern conveniences, whilst simultaneously having clean air, abundant rainforests, fresh drinking water and a stable climate. This generation can have one or the other but not both. Humanity must make a choice. Both have an opportunity cost. Gadgetry or nature? Pick the wrong one and the next generations may have neither.”