A worker uses steam to remove ice from a footpath in front of the congress centre, venue of the World Economic Forum (WEF) in Davos, Switzerland January 13, 2020.

Protesters wearing costumes attend a demonstration against the World Economic Forum (WEF), which begins on January 21, in the town of Landquart, Switzerland January 19, 2020.

Swiss President Simonetta Sommaruga shakes hands with European Commission President Ursula von der Leyen at the House of Switzerland, on the sidelines of the World Economic Forum (WEF) annual meeting in Davos, Switzerland January 20, 2020. Alessandro della Valle/Pool via REUTERS.

A general view shows the congress centre, the venue of the World Economic Forum (WEF), during preparations for the annual meeting in the Swiss Alps resort of Davos, Switzerland January 19, 2020.

The Intercontinental Hotel is seen behind a farm house in Davos, Switzerland January 13, 2020.

A snowman is pictured on the roof of the Congress Center ahead of the World Economic Forum (WEF) annual meeting in Davos, Switzerland January 20, 2020.

Climate activists take part in a march to highlight issues surrounding climate change at the World Economic Forum Davos (WEF), through the Chlus gorge along the Landquart river near Landquart, Switzerland January 19, 2020.

A police officer stands guard near the Congress Center ahead of the World Economic Forum (WEF) annual meeting in Davos, Switzerland January 20, 2020.

Klaus Schwab, founder and Executive Chairman of the World Economic Forum (WEF), addresses a news conference ahead of the Davos annual meeting in Cologny near Geneva, Switzerland, January 14, 2020. Image for illustrative purposes.

People pose for a picture at the venue of the World Economic Forum (WEF) during preparations for the annual meeting in the Swiss Alps resort of Davos, Switzerland January 19, 2020.

A watchtower is photographed at the fenced area which will be used as heliport during the upcoming World Economic Forum (WEF) in Davos, Switzerland January 13, 2020.

Two marksmen of the Police of the Canton of Zurich stand on an observation post at the airport in Zurich, Switzerland January 20, 2020.

World Economic Forum (WEF) President Borge Brende attends a news conference ahead of the Davos annual meeting in Cologny near Geneva, Switzerland, January 14, 2020.

Klaus Schwab, founder and Executive Chairman of the World Economic Forum (WEF), addresses a news conference ahead of the Davos annual meeting in Cologny near Geneva, Switzerland, January 14, 2020.

A security barrier is pictured in front of the Congress Center ahead of the World Economic Forum (WEF) annual meeting in Davos, Switzerland January 20, 2020.

A police officer stands guard near the Congress Center ahead of the World Economic Forum (WEF) annual meeting in Davos, Switzerland January 20, 2020.

A sign is pictured at the Congress Center ahead of the World Economic Forum (WEF) annual meeting in Davos, Switzerland January 20, 2020.

People pass the national flags of several countries, ahead of the World Economic Forum (WEF) annual meeting in the Swiss Alps resort of Davos, Switzerland January 19, 2020.

IMF Managing Director Kristalina Georgieva attends a news conference ahead of the World Economic Forum (WEF) in Davos, Switzerland January 20, 2020.

A general view shows the alpine resort of Davos, Switzerland January 19, 2020.