International Chamber of Shipping chairman, Masamichi Mooroka, has written to Christine Lagarde, the Managing Director of the International Monetary Fund (IMF), following her reported comments that fuel charges on shipping and aviation could raise one quarter of the total money to be directed by developed nations to the UNFCCC Green Climate Fund. In the letter ICS challenges several simplistic assumptions apparently made by Ms Lagarde. The ICS chairman notes that Ms Lagarde has been quoted as saying that "charges on international aviation and maritime emissions would raise about a quarter of the $100 billion needed for climate adaptation and mitigation in developing countries-resources that developed countries have committed to mobilize by 2020".