The Dutch government has just introduced similar departure taxes of its own - €11.25 (£8.90) for short-haul and €45 (£35.50) for long haul. What does that say about them?
Actually, I tend to think the Dutch government are even worse. A case in point: they tax diesel and lpg cars at a significantly higher rate than the less efficient, more polluting petrol versions. A clear case of 'we want your money, and we are willing to encourage more environmental damage to get it'.
At least the UK, while having 'green' taxes that are nothing to do with helping the environment (apart from discouraging the activity, one could say), aren't actively taxing against the environmentally friendly option