FSZSX

PashasMom

Fidelity does offer sustainability screened target date funds if those appeal to you. For example, FSZSX is the the Fidelity Sustainable 2060 Target Date Fund. However, they are actively managed and have a higher expense ratio, so those may not be at the top of your list. For your "three fund portfolio" are bonds one of your components? If you are willing to have a static bond allocation, consider EAOA, which is an ESG-screened balanced fund with 80% global equities and 20% bonds. No rebalancing or tweaking required. If you don't want bonds, but want to simplify things, you could look at a global equity fund that is at least screened for environmental impact, like KLMT or NZAC. These tend to be focused on a smaller group of large companies though.