For instance, the EPA's mission is "to protect human health and to safeguard the natural environment-air, water, and land-upon which life depends."
(the EPA's mission; is; to protect human health and to safeguard the natural environment-air, water, and land-upon which life depends)
the EPA's mission
is
to protect human health and to safeguard the natural environment-air, water, and land-upon which life depends