where has some of the acid rain and forest decline been observed
How was the planet Uranus been observed
Iodous acid is the chemical compound with the formula HIO2. Its' salts are named iodites; these are exceedingly unstable and have been observed but never isolated. They will rapidly break apart into iodine and iodates (the salt of iodic acid).
Judgement based on what has been observed is a conclusion.
The Higgs boson. In fact, it has not been observed by 2011.
The Black Forest in Germany has been damaged by deforestation, mostly due to logging activities and urban development. Additionally, climate change and pollution have also contributed to the degradation of this area. Efforts are being made to restore and protect the forest.
Acid Rain impact was first observed in the Black Forest in Germany in the 1960s. It was termed Waldsterben or tree death. Related impacts with gaseous sulfur dioxide emissions were known for several years earlier.
"Observed" is a word that means something has been noticed.
Not on another planet per se. Venus and Mars have volcanoes, but none have been observed to erupt. Volcanic eruptions have been observed on Io, one of the moons of Jupiter.
The Black Forest in Germany is one of the areas in Europe that has been affected by acid rain, leading to damage to forests and waterways. Acid rain is also a significant issue in Scandinavia, where it has caused damage to forests, lakes, and wildlife.
calderas
It is basalt
Basalt