LONDON (Reuters) -Adverts from Lufthansa, Air France-KLM and Etihad Airways were banned by Britain’s advertising regulator on Wednesday for giving a “misleading impression” of the airlines’ environmental impact. The Advertising Standards Authority (ASA) said the ads had breached advertising rules, and “must not appear again in the form complained about.” In the Google ads that were all seen in July, Lufthansa said people would “Fly more sustainably” with the airline. An Air France-KLM advert said it was “committed to protecting the environment” and helped people to “travel better and sustainab…