Louise Gray likes to know exactly where her food comes from. For her first book, The Ethical Carnivore, she only ate animals she killed herself. Her conclusion was that meat should be treated with the reverence it deserves and we should all be eating less for the sake of climate change. The book won Best Food Book and Best Investigative Work at the Guild of Food Writers Awards.

In her new monthly investigative series for Wicked Leeks, Roots to Fruits, Louise takes one fruit or vegetable a month and distils their complex stories into a column to help us make better decisions. Having recently become a mother, her aim is to find ways to buy fruit and vegetables that have a positive impact on the planet for the next generation. And yes, she will be trying to find out if avocados can ever be ethical.