BBC News - Merlyn Thomas
Environmental groups are suing Dutch airline KLM, alleging that adverts promoting the company's sustainability initiative are misleading.
The groups say it's the first lawsuit to challenge so-called airline industry "greenwashing".
They argue that KLM adverts and their carbon-offsetting scheme create the false impression that its flights won't make climate change worse.
But KLM says the company's statements are "based on solid arguments", and that it believes its adverts "comply with the applicable legislation and regulations".
