The Partnership Project is organized and operated exclusively to enhance protection of the natural environment by improving the effectiveness of environmental organizations. It currently has 17 groups participating, including the largest environmental advocacy groups in the country. By uniting their members and contributors on coordinated actions, the participating groups are creating a sum of citizen participation and advocacy greater than they could generate acting apart.
This 501(c)(3) elected the 501(h) safe-harbor — lobbying expenditures are capped under a clear dollar formula instead of the "insubstantial part" standard.