Nitrates are supposed to be toxic for humans or other living beings but this problem in not entirely solved today and is now disputable.
See also the link below.
Not recommended; silver nitrate is corrosive and dangerous.
In most cases, it is not dangerous as it is a neutral salt.
Calcium carbonate is not dangerous for the environment !
No. Saltpeter is a dangerous substance.
Adapting to the dangerous eviorment ?
Zirconium is not dangerous for the environment.
Some of them (e.g. ammonium nitrate) can be explosive.
Means that it can harm the environment or aquatic environment
Cadmium is considered dangerous for the environment.
The silver nitrate, but this is a dangerous compound.
totally
Ammonium Nitrate and water. Urea + plus a Non-Toxic Cooling Additive and Water providing a safer alternative to the dangerous Ammonium Nitrate *Ammonium Nitrate is highly dangerous and used as an oxidizing agent in explosives.