A young boy spoke to Prince Harry about trains during his visit to Edinburgh
The royal couple were greeted by crowds as they arrived at the Esplanade in front of Edinburgh Castle.
Glass bottles will replace plastic equivalents in meetings and on-site cafes while non-biodegradable food packaging and plastic straws are also set to be phased out.
The new measures will affect Buckingham Palace, Windsor Castle and the Palace of Holyroodhouse.
A palace spokesperson said the Royal Household was "committed to reducing its environmental impact".
Britain "needs and deserves a new floating palace" claims an MP calling for a new lottery to fund the £120m project.
The Duchess of Cambridge meets staff and patients at Action on Addiction in Essex.
King Harald V was paying tribute to the similarities between Norway and the UK