Beyonce and Jay-Z are giving fans the chance to win concert tickets for the foreseeable future if they give the plant-based lifestyle a shot.

Beyonce announced the Greenprint Project on her Instagram Wednesday night, with the official website explaining just how much of an impact veganism can have on the world.

The page states, “It starts with one meal but can expand to a lifetime of positive global impact.”

It also urges people to “discover the positive impact you would have on the world if your social followers also ate plant-based meals… We each have the potential to save our planet with our meal choices.”

Fans then get the chance to enter their email address to win Beyonce/Jay-Z tickets.

This isn’t the first we’ve heard of Bey and Jay’s veganism. The musicians, who share daughter Blue Ivy, 7, as well as one-year-old twins Rumi and Sir Carter, previously wrote an introduction for Beyonce’s trainer Marco Borges’ new book The Greenprint: Plant-Based Diet, Best Body, Better World.

The duo wrote, according to People: “Having children has changed our lives more than anything else.”

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“We used to think of health as a diet – some worked for us, some didn’t. Once we looked at health as the truth, instead of a diet, it became a mission for us to share that truth and lifestyle with as many people as possible.”

Beyonce and Jay-Z also said they “want to challenge you, as we challenge ourselves” in the piece.

“We all have a responsibility to stand up for our health and the health of the planet. Let’s take this stand together. Let’s spread the truth. Let’s make this mission a movement. Let’s become ‘the Greenprint’.”

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