Prince Charles campaigned to alter climate-change agreements without disclosing his private estate had an offshore financial interest in what he was promoting, BBC Panorama has found.
The Paradise Papers show the Duchy of Cornwall in 2007 secretly bought shares worth $113,500 in a Bermuda company that would benefit from a rule change.
The prince was a friend of a director of Sustainable Forestry Management Ltd.
The Duchy of Cornwall says he has no direct involvement in its investments.
A Clarence House spokesman said the Prince of Wales had "certainly never chosen to speak out on a topic simply because of a company that it may have invested in.
“In the case of climate change his views are well known, indeed he has been warning of the threat of global warming to our environment for over 30 years.
“Carbon markets are just one example that the prince has championed since the 1990s and which he continues to promote today.”
