they aren't
It has been polluted.
The atmosphere has become much more polluted over time because of man made influences.
A Dome is basically a arch that is turned over to its vertical axis.
Over 9000
Because our earth can be over polluted by paper and trash da
Bridges over polluted waters as the song goes
All oceans have been polluted in some way, shape, or form. Oceans have been polluted be agricultural runoff and the dumping of garbage.
A shade that is placed over a glass
A Dome is basically a arch that is turned over to its vertical axis.
They become polluted by people throwing away trash into the water. And by landfills on the ocean and oil spills. Then all this garbage travels all over the oceans killing marine life.
million cities or megacities