A couple of synthetic (man made) fertilizers used for gardening are Miracle Gro and Scott's products.
They are not better than organic fertilizers. They can really harm the plant. ---------- Organic fertilizer is only a source of nitrogen; chemical manmade fertilizers can offer nitrogen, potassium, phosphorous and other microelements. These fertilizers are stable and can be easily transported at long distances. Natural fertilizers are insufficient for all the world.
Some are. Most are not
Organic fertilizer is only a source of nitrogen; chemical manmade fertilizers can offer nitrogen, potassium, phosphorous and other microelements. These fertilizers are stable and can be easily transported at long distances.
the Reichstag is one of them
Some stuff can be free if manmade, although, sooner or later, it will come up in somesort of cost.
Most bridges are manmade, built in the location where they are required. Some natural bridges of rock or timber exist in wilderness areas.
Manmade actually.
Manmade
No. Some fertilizers contain sulfates, but not sulfuric acid.
manmade
some examples are :-
Organic fertilizer is only a source of nitrogen; chemical manmade fertilizers can offer nitrogen, potassium, phosphorous and other microelements. These fertilizers are stable and can be easily transported at long distances. Natural fertilizers are insufficient for all the world.