Looking at the "grass" in Ji You's hand, Guan Ning was very skeptical about whether it was edible. It's not surprising she had such doubts now, because the current environment is nothing like during the times of Ancient Earth. The majority of plants are exposed to strong radiation and are harmful to the body.
In today's society, there are two types of food supplied for residents: synthetic food and natural food. Synthetic food is created by combining several or various edible materials. A large portion of these materials comes from radiated animals, plants, or minerals, which are continuously filtered and purified to ensure they are harmless to humans before being processed into different foods.
