I claim the ornamental design for an environmental monitor, as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request of the necessary fee.
FIG. 1 is a three-dimensional view of an environmental monitor showing my new design;
FIG. 2 is a bottom view of the environmental monitor shown in FIG. 1;
FIG. 3 is a left view of the environmental monitor shown in FIG. 1;
FIG. 4 is a front view of the environmental monitor shown in FIG. 1;
FIG. 5 is a right view of the environmental monitor shown in FIG. 1;
FIG. 6 is a top view of the environmental monitor shown in FIG. 1; and,
FIG. 7 is a rear view of the environmental monitor shown in FIG. 1.