The mission of the US Environmental Protection Agency is to protect human health and to safeguard the natural environment - air, water, and land - upon which life depends.
(The mission of the US Environmental Protection Agency; is; to protect human health and to safeguard the natural environment - air, water, and land - upon which life depends)
The mission of the US Environmental Protection Agency
is
to protect human health and to safeguard the natural environment - air, water, and land - upon which life depends