"As our nation moves ahead, PM Lee’s National Day message reminds us that it is timely to reflect on how we can be proactive about increasing our “environmental productivity”, or the amount of economic output per unit of input of environmental resources. Increasing “environmental productivity” can be achieved most considerably by increasing economic output while decreasing environmental input. Variances of this concept have been around for decades.
In Europe, researchers introduced the concept known as material input per service unit, or MIPS for short. Researchers around the world have since created metrics and derived databases that evaluate how much of various environmental resources a process consumes in order to produce a unit of a certain kind of service. A consciousness toward such a concept should take root in our economy, with tangible economic benefits to be enjoyed by firms that reduce their MIPS."