there is no way to avoid causing harm in this world

seems like that, unless we stop the universe or end it all. afaik there is no evidence for plants consciousness, or feeling pain. but eating plants harms plants, which are life. they do react, communicate to the environment, which includes what humans do to them. besides there is a ton of organisms in our body dying to maintain we alive. i mean, even the sun is dying while earth and life on it consumes its energy… seems like suffering, death, disorder, is one way or another the nature of where we are; one exploring/exploiting other entities existence for maintaining its own existence and prosperity. on harming existing entities, we just judge as moral/immoral on the degree to what is closer to our nature (which include ourselves, animals, plants, …) and what will impact them (work exploitation, capitalism, environments damage, animal murdering, …).