Paul McCartney wants Starbucks to come together for the betterment of the planet.
The music legend penned a letter to outgoing Starbucks CEO Kevin Johnson this week asking for a change to the chain's policy on up-charging Americans for plant-based milks, including soy, oat and almond.
The letter was penned to support an initiative by the People for the Ethical Treatment of Animals.
"It recently came to my attention that Starbucks in the USA has an extra charge for plant based milks as opposed to cow's milk. I must say this surprised me as I understand that in other countries like UK… there is the same charge for both types of milk and I would like to politely request that you consider this policy also in Starbucks USA," the Beatle wrote.
"My friends at PETA are campaigning for this to happen and I have agreed to support them with the quote: 'Sir Paul is asking Starbucks to end its surcharge on plant milks,' and I sincerely hope that for the future of the planet and animal welfare you are able to implement this policy," he wrote before signing off.
Paul, who owns several homes in America, has long been outspoken about his vegetarian lifestyle, which he reportedly adopted in the '70s.
Billboard, who first reported on Sir Paul's letter, said the Seattle-based company currently charges 70 cents extra for non-dairy milk. According to PETA, producing cow's milk generates around three times more greenhouse-gas emissions, and uses nine times more land than vegan options do. It takes 628 liters of water to make 1 liter of cow's milk, while oat or soy milk requires 90% less water.
The icon's letter comes a month ahead of two scheduled Seattle concerts at the Climate Pledge Arena, a venue not far from Starbucks' headquarters.
In a statement given to the New York Post, PETA president Ingrid Newkirk said, "Paul is in a bit of a COVID-19 bubble on the tour as any cancellation would be a huge problem, so instead of going out to a Starbucks with PETA to give away soy lattes, he decided to pitch in by personally writing to the company."
The PETA President added, "Even the name of the venue is a reminder that cow's milk production contributes to global climate change, something Starbucks should get behind."