But I Could Never Go Vegan!: 125 Recipes that Prove You Can Live Without Cheese, It's Not All Rabbit Food, and Your Friends Will Still Come Over for Dinner (English Edition) von Kristy Turner, http://www.amazon.de/dp/B00M9P7JJY/ref=cm_sw_r_pi_dp_WCW6tb1H1V1V2
You're sick, you're blowing your nose into a tissue, and then...you look, right? Isn't green mucus supposed to mean something? Actually, your snot can come in a rainbow of colors, with a progression from white to yellow to green as your body fights infection.