What information would you like to see on a product label?
In my mind I have: ingredient information, producer information (farm details for example), CO2 production output, how recyclable are the materials based on a color scale.
This lets you easily compare across products with different sizes.
See https://www.wholekids.com.au/wp-content/uploads/australian-f...
A sticker on a diesel car would be RED/RED and a sticker on a tiny EV car would be RED/GREEN.
A sticker on an apple from a domestic market would be GREEN/GREEN and an apple imported from a country 1000s miles away would be GREEN/ORANGE.
Ideally, the labeling would be a reflection of a fiscal mechanism to charge for externalities in the entire chain - from production to a sale and disposal.