My global-warming believing brother flies all over the world on vacations and short visits. We don’t get into it anymore - but I’ll have to keep this in mind just in case.
If appeal to hypocrisy were a convincing argument, no one would take global warming hysteria seriously. (Maybe no one does, maybe they're all just virtue signaling hypocritical jerks.)
An environmentalist is someone who believes that country homes and two car garages are bad, when other people want them.