We walked to the local shops and didn't climb into a 300-horsepower machine every time we had to go to a supermarket.
We bought fruit and veg loose - and washed them at home. We didn't have to throw away bins full of plastic, foam and paper packaging that need huge recycling plants fed by monster trucks all day, everyday.
Back then, we washed the baby's nappies because we didn't have the throw-away kind. We dried clothes on a line, not in an energy gobbling machine burning up 220 volts -- wind and solar power really did dry the clothes.
Kids got hand-me-down (mostly hand made or hand knitted) clothes from their brothers or sisters, not always brand-new clothing shipped from the other side of the planet.
But that old lady is right; we didn't have the green thing back in our day.
Back then shops repaired things with funny things called spare parts - we didn't need to throw whole items away because a small part failed.
Back then, we had one TV, or radio, in the house -- not a TV in every room. And the TV had a small screen the size of a handkerchief (remember them?), not a screen the size of Wales.
In the kitchen, we blended and stirred by hand because we didn't have electric machines to do everything for us.
When we packaged a fragile item to send in the mail, we used a wadded up old newspaper to cushion it, not Styrofoam or plastic bubble wrap.
Back then, we didn't fire up an engine and burn petrol just to cut the lawn. We used a push mower that ran on human power and hand clippers for the hedges.
We exercised by working so we didn't need to go to a brightly lit, air conditioned health club to run on treadmills that operate on electricity and then drink millions of bottles of that special water from those plastic bottles.
But she's right; we didn't have the green thing back then.
We drank from a fountain when we were thirsty instead of using a plastic cup or a plastic bottle every time we had a drink of water.
We refilled writing pens with ink instead of buying a new plastic pen, and we replaced blades in a razor instead of throwing away the whole plastic razor just because the blade got dull.
But we didn't have the green thing back then.
Back then, people took the bus and kids rode their bikes to school or walked instead of turning their parents into a 24-hour taxi service.
But isn't it sad the current generation laments how wasteful we old folks were just because we didn't have the green thing back then?