Eco-Friendly Sims can still eat non-organic food without any negative reactions. They are not bothered with eating meat, unlike Vegetarian Sims.
Sims prefer more expensive appliances because they use less energy than cheaper ones. This might be a little conflicting with Frugal trait.
Eco-Friendly Sims seem to enjoy riding motorcycles and scooters; they're not considered to be wasting resource. Thus, it doesn't conflict with Rebellious trait that also prefers riding the motorcycles.
Eco-Friendly Sims can also have the Vehicle Enthusiast trait as well, despite the fact that they would appear to conflict as Vehicle Enthusiast trait likes to have vehicles, which is considered as a wasting resource for Eco-Friendly trait.