We have polluted it— the air, water and the ground.
Some people have tried to clean up the environment
The answer to your question is Vegetative Propagation.
Vegetative Propagation is defined as a form of asexual reproduction of a plant. It occurs when only one "parent plant" is involved in producing an offspring that will be genetically identical to the parent.
Do you know what a pangea is well Pangea is another supercontinent the reason why we're not Pangea is because something dead which oceans with lava cools off it cools off from old to new the new rocks are pushing the consonants together and eventually and a couple of million years it will be Pangaea again
Water quality testing would be the best approach.