They added: "At all levels, there's a strong desire to tackle this issue". Buckingham Palace spoke of new waste plans, including measures to phase out straws in public cafes and ban them completely in staff dining rooms.
The move comes after the Daily Mail launched its Turn The Tide On Plastic campaign past year.
One of the main catalysts for the nation's recent heightened awareness of plastic overuse, was David Attenborough's wildlife documentary Blue Planet II, which highlighted how ecosystems in the ocean could be destroyed with plastic waste.
The pair, both 91, were pictured laughing and joking previous year as they discussed the Queen's Commonwealth Canopy project - which will set up forested conservation parks across 53 countries.
A "green" newsletter with updates will also regularly go out to staff, and recycling of certain plastics will form part of waste contracts.
Speaking to environmentalists in London last month, the Prince of Wales said that "we can not, indeed must not, allow this situation to continue".
The eco-friendly rules are understood to have been in place for some time at Clarence House.
The palace is also considering solar thermal panels, ground source heat pumps, electrical heating, and fuel cells and estimates that the refit will save 554 tons of carbon each year.
Richard Harrington, of the Marine Conservation Society, said: 'This shows real leadership and sets a great example.
Buckingham Palace has a web page devoted to the environment, which says the royal household "is working hard across operations in the Royal Palaces and Estates to reduce its impact on the environment, using everything from energy efficient LED (light-emitting diode) lighting to hydro-electricity generating plants to ensure efficient running of its sites". "As part of that, we have taken a number of practical steps to cut back on the use of plastics".
The Queen is tackling plastic use in multiple ways.