We as humans haven't yet learnt to co-exist with other animals and maintain the equilibrium on Earth. What makes us think we are going to treat Mars any better? Please don't get me wrong, I am all for exploring the planets, in fact I am annoyed that we don't yet have the technology to visit a system like TRAPPIST-1. But unless we learn to be considerate towards nature and other species which inhabit this planet we are not going to be good residents on other planets. Just my two cents.