Attorney Michael Avenatti, the colorful attorney who came to prominence representing Stormy Daniels against Donald Trump, is unhappy with his jail conditions.

On Monday, his attorney wrote to the federal judge overseeing his trial to complain about the jail conditions Avenatti is experiencing during pre-trial detention.

Scott Srebnick, Avenatti's attorney, wrote to Judge Paul Gardephe to complain about the "notorious 10-South" section of the Metropolitan Correctional Center, where he is being held in the Special Housing Unit.

"He is in a cell reportedly once occupied by El Chapo, on a floor that houses individuals charged with terrorism offenses," Avenatti's attorney wrote.

The starkly opposed visions of US President Donald Trump and Swedish teen activist Greta Thunberg on climate change will clash in Davos on Tuesday as the World Economic Forum tries to face up to the perils of global warming on its 50th meeting.

The four-day gathering of the world's top political and business leaders in the Swiss Alps gets under way seeking to meet head-on the dangers to both the environment and economy from the heating of the planet.

Trump, who has repeatedly expressed scepticism about climate change, is set to give the first keynote address of Davos 2020 on Tuesday morning, on the same day as his impeachment trial opens at the Senate in Washington.