positive & negative effects of volcano?

Question

Tks!!

Answer 1

There are numerous effects, I'll give you some of the main ones:

Negative
Destroys the surrounding land in the short term
Large eruptions can cause extinctions, climate change and completely transform the local landscape
Destruction of property, farm land and other man made structures
Death of some human beings
Extreme weather conditions, often cause problems with aircraft and ships
Tsunamis can be caused, e.g. the Krakatoa eruption


Positive
Increased fertility of the soil in the long term leads to better farming
Better farming leads to population growth
Wipes the slate clean and allows recolonisation by native plants and animals
Every eruption increases our knowledge of vulcanology and seismology which may lead to more effective warning systems in the future
Creates land, e.g. volcanic islands over hotspots or Iceland
Brings rock from the mantle to the Earth's surface for scientific research. The oldest rocks on this planet have been revealed through this method (not counting meteorites)

Answer 2

Effects are purely subjective things, don't you think? One person's beach overrun with lava is another one's island forming real-estate investment. A negative effect would be all the nasty ash that buries everything in some cases. Do you think the scientists excavating Vesuvius see it as a bad thing? It is their life's work, after all! Another negative effect is the loss of houses and roads from encroaching lava. Lava, on the other hand, is said to be some of the most fertile ground after it cools off. The flow of lava also brings up minerals and ores that were once deep within the earth.
Volcanos are a source of earthqakes. I don't see any positive side to that one. Deep sea volcanoes are islands of life. It is theorized that if we are going to find life on other planets or even a few moons in our own solar system, a good place to look would be at the site of an undersea volcano on that planet/moon.

I hope this gives you some ideas on the pro's and cons of volcanoes.

Answer 3

Islands are formed by volcanos. Hawaii very positive!

Answer 4

helpful: ~Volcanoes are our purely actual source of rock samples from deep interior the earth; we've discovered a lot concerning the composition of the mantle by skill of reading them. ~Volcanic activity probably brought about the explosion of existence on earth by skill of springing up a helpful climate by skill of international warming. ~Many volcanoes produce new crust above sea point, which helps offset the lack of continental crust through weathering. detrimental: ~Volcanoes are unfavourable forces, and have destroyed human settlements. ~Volcanoes can critically regulate climate varieties after eruptions. they could reason international cooling by skill of blockading the solar's rays with thick clouds of ash, and that they could reason international warming by skill of filling the ambience with greenhouse gasses.

Answer 5

believe it or not it cools the earth temp, by blocking sun's rays
in 1800's a super volcano erupted it caused summer temps to be very low in north America.

look it up on-line, or Discovery.com

Answer 6

Volcanic material is very fertile so it increase plant growth. They also throw out tones of methane and carbon dioxide which allegedly cause global warming as well as more CFCs than all the aerosol cans ever made.

Answer 7

positive it throughs up new land and makes a change to the earth negative it could course the sea level to be risining if only slowly and it is very destroctive of homes and lifes in the path of the larva.