An episode of David Attenborough's Frozen Planet series that looks at climate change will not be aired in the US, where many are sceptical about global warming.
Seven episodes of the multi-million-pound nature documentary series will be aired in Britain. However, the series has been sold to 30 world TV networks as a package of only six episodes. These networks then have the option of buying the seventh "companion" episode -- which explores the effect man is having on the natural world -- as well as behind the scenes footage.
The six-episode series has been sold to 30 broadcasters, ten of which have declined to use the climate change episode, "On Thin Ice", including the US.
In America, the series is being aired by the Discovery channel, which insists that the final episode has been dropped because of a "scheduling issue".
Regardless of their reasoning, environmental campaigners have criticised the BBC's decision to market the episode separately as "unhelpful". And it has caused controversy across the board. The Telegraph's headline  ("BBC drops Frozen Planet's climate change episode to sell show better abroad") sums up how the news has been received.
However, the BBC have defended the decision, claiming that it is more to do with a difference in style in this episode than its content. Caroline Torrance, BBC Worldwide's Director of Programme Investment, wrote in a blog  that the first six episodes "have a clear story arc charting a year in our polar regions", adding:
Although it is filmed by the same team and to the same production standard, this programme is necessarily different in style.
Having a presenter in vision requires many broadcasters to have the programme dubbed, ultimately giving some audiences a very different experience.
Audiences are currently enjoying incredible footage of the natural world; it would be a shame for them to leave without a sense of the danger it faces.