Davos in Switzerland is preparing for the World Economic Forum (WEF), which kicks off this week. The ski resort will host some of the world's top business people, celebrities, politicians and public speakers, gathering to discuss ways to "improve the state of the world" and influence the global agenda. 

The event is held annually and attracts important speakers from across the globe. Last year, the UK's Prince William gave a speech on mental health, while the naturalist and environmentalist David Attenborough has used the platform to deliver speeches warning about climate change. 

Typically, around 3,000 people attend the WEF. Attendance is possible either through invitation, in which case the event is free, or through being a member of the WEF, which can cost £480,000 ($624,000). 

In the past there have also been protests at the event. Such as that against male dominance of the world economy, led by Ukrainian activist group Femen. 

But some critics say attending Davos has become a symbol of being a member of the "global elite" and access is not even equal among the most high-profile guests, who wear different colored badges that determine where you can get access. 

White badges with a hologram on them provide access everywhere, whereas, at the other end of the scale, a "hotel" badge means you cannot access the conference center at all. 

But while the event is set to be the center of all discussions about world issues, as well as being carbon neutral, the surrounding landscape is a stark reminder of the urgent need to act quickly on climate change. 

Guy Henderson took to the skies above Davos to get an aerial view of how the ski resort is an important reminder of the need to tackle the climate crisis.