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