Photo via Meat Free Monday

It’s Paul McCartney’s 67th birthday! And what Paul wants most is not for us to sing “(na na na na na na) you say it’s your birthday,” but to show our support for his newest endeavor, Meat Free Monday, which officially launched this week.

Paul, a longtime vegetarian and advocate for the ethical treatment of animals, recognizes that not everyone is willing or ready to make the switch to a completely meat-free diet. Instead, he’s asking us to forgo meat for just one day a week:

“I think many of us feel helpless in the face of environmental challenges, and it can be hard to know how to sort through the advice about what we can do to make a meaningful contribution to a cleaner, more sustainable, healthier world. Having one designated meat free day a week is actually a meaningful change that everyone can make, that goes to the heart of several important political, environmental and ethical issues all at once.”

Sir Paul is encouraging us to go veggie not only because it’s healthy and animal-friendly, but also because it helps fight global warming.

Huh? What’s the connection between eating meat and climate change? According to the Food and Agriculture Organization of the United Nations, the livestock industry accounts for upwards of 18% of greenhouse gas emissions worldwide. Eating meat is so energy intensive, in fact, that Compassion in World Farming estimates that the average UK household can reduce more emissions by cutting their meat consumption in half than by cutting their car use in half.

He’s making it real easy for us to skip the meat by sharing vegetarian recipes from his dearly departed wife Linda’s cookbook each week. The UK’s top chefs are also contributing their favorite meat-free dishes.

Hey Paul? I signed up. “I’m glad it’s your birthday. Happy birthday to you.”