I don’t generally get star struck, and food is not one of my writing niches, as the cook at the ‘ol econest is my husband, but when a Beatle and an Oscar-winning actress get involved in something I care deeply about, like whether or not to eat meat, I’m over the moon. Actress Gwyneth Paltrow has a blog. She and Paul McCartney, a dyed-in-the-wool vegetarian, have a story to tell about the environmental impact of raising livestock.