"The head of the UN body that leads on sustainability and green issues has been criticised for extensive and expensive air travel.
A draft internal audit, obtained by the Guardian and seen by the BBC, says that Erik Solheim's actions risked the reputation of UN Environment.
The report says he incurred costs of $488,518 (£373,557) while travelling for 529 out of 668 days.
There was "no oversight or accountability" to monitor this travel.
...
Across UN Environment, around $58m was spent on travel in the two years up to 2018.
OIOS points out that the amount of money UN Environment spends on travel essentially doubled over the three years between 2014 and 2017.
While all UN staff are expected to complete "mission reports" within two weeks of travel, OIOS found that these were often missing.
When they requested reports for 596 trips undertaken by 32 managers and staff, 210 mission reports were not provided, while around 200 others were only completed after the request was made..."