That's patently untrue. It takes energy to create and transport bags.
right. so carrying (relatively heavy) reusable bags in your car at all times "just in case" burns more energy than not having any bags on board. and just using plastic bags supplied by the store to bring groceries home once a week. if you are going to count the rather insignificant energy used by bag delivery trucks you have to apply a similar argument to reusable bags being driven around all the time and not used often.
also:
This is a huge amount. But it's actually a pretty small percentage of the total amount of plastic we throw away: 31.8 million tons annually. And this total is still smaller than the amount of food waste we throw away — 36.4 million tons per year.
In other words, we throw away ten times as much food as plastic bags. If we care about reducing garbage, fixating on the huge amount of food waste might make more sense.
https://www.vox.com/...ags-environment
When it comes to greenhouse gases, they're once again dramatically less important than the products we buy and put inside them.
In 2002, when considering a tax on plastic bags, the Australian government conducted one of the most detailed studiesof their lifetime environmental costs. They calculated that an average bag has .48 megajoules (MJ) of energy embodied in it — that is, .48 MJ of energy went into producing the plastic polymer, manufacturing the bag, and transporting the various inputs to make it all possible. More energy means more greenhouse gas emissions.
For comparison, making a one-liter plastic bottle — the kind used to hold water, juice, or soda — requires 3.4 MJ. A can of corn requires about 12.82 MJ. A single order of french fries uses up about 3.7 MJ, and a quarter-pound hamburger about 19.88 MJ.
Edited by Victoria Watcher, 16 May 2019 - 03:53 PM.