Boeing 787-9 Dreamliner

Substantially. Across aircraft models CO2 runs from 60 to 360 grams per revenue passenger kilometre, against a global average of about 90 grams. The 787-9 burns about 2.31 litres per 100 passenger kilometres and the A350-900 about 2.4, while a short haul 737 MAX 8 is around 2.5 with a higher share of climb.

No, and no maker says so. Official range is measured at 23C with unrealistically gentle acceleration. Which? found a 16 percent average shortfall across UK market models, and in cold weather What Car? found no car came within 20 percent of its official figure, some short by nearly 40 percent. In mixed UK driving expect 70 to 80 percent of the brochure number.

No. The branded trims sold as vegan leather, Veganza, Sensatec, MB-Tex, Artico and SofTex among them, are polyurethane or PVC. PVC is softened with phthalates, which are endocrine disruptors, it does not biodegrade, and it sheds microplastics as it wears. Removing the animal is a real gain on welfare. It is not automatically a gain on materials.

No. Non exhaust sources are now around 60 percent of roadside PM2.5 and 73 percent of PM10, and tyre wear alone runs over a thousand times the regulated exhaust limit. Battery electric vehicles cut brake dust by roughly 83 percent through regenerative braking but add tyre wear through weight, netting about 38 percent less total particulate than petrol. No maker publishes a tyre wear figure, and Euro 7 is the first rule to touch it.

Usually offset rather than reduced. The ASA now bans carbon neutral and net zero claims resting on offsetting unless the offsets can be shown to work, after a Guardian investigation found more than 90 percent of offset schemes worthless. The ASA has already ruled against a car maker over an air quality claim. Check whether a claim describes emissions actually cut or emissions paid for elsewhere.

Worth checking before you sign. Makers have charged a monthly fee for heated seats where the hardware was already fitted and paid for, and firmware for one 2024 model pointed to paid front heated seats alongside a range limited in software. Ask what stops working if you stop paying, and whether it passes to the next owner.