STEM advocates for the preservation and protection of open space and natural resources located in Moorestown. The organization regularly provides input into the Township’s Master Plan, and it monitors proposed zoning ordinances and zoning and planning board activities that are relevant to environmental conservation.

Through its support for the Moorestown Open Space Advisory Committee, STEM helps to prioritize properties for preservation and acquisition, including the mapping of critical environmental sites. STEM also assists the Moorestown Environmental Advisory Committee (MEAC) with maintaining an inventory of open space found in Moorestown.

STEM actively pursues preservation of open space through direct acquisition or through conservation easements. STEM also helps other land trusts to acquire and maintain open space in Moorestown.