I often hear arguments from people around me, about the environmental impact of certain consumer behaviours like:
- eating meat
- using plastic bags
- travelling via car instead of plane
and many others.
However, most of the time things are not as simple and objective data is hard to come by and involves a ton of research on every single item it seems.
Some example of things, which seem to be sustainable or environmentally friendly but actually aren't:
- Salad has a very high energy usage per calorie
- cotton bags need thousands of uses, before you can environmentally break even on them
- cattle's water usage is debated and some numbers seem to be greatly inflated
- organic food seems like a good idea, but actually requires more space, energy and is most likely not sustainable for the whole world to feed
Is there a somewhat easy and objective source on consumer behaviour regarding environmental impact? What are objectively the most important metrics to watch out for? Energy usage per unit of product? CO2 impact? Water usage? Impact on flora and fauna (not sure, how this can be quantified).