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The main long-term effect is through global climate change, which reduces the temperature globally by about 5–15 °C for a decade, together with the direct effects of the deposits of ash on their crops. A large supervolcano like Toba would deposit one or two meters thickness of ash over an area of several million square kilometers.
Social impact assessment (SIA) is a methodology to review the social effects of infrastructure projects and other development interventions. Although SIA is usually applied to planned interventions, the same techniques can be used to evaluate the social impact of unplanned events, for example, disasters, demographic change, and epidemics.
Environmental disasters show how the impact of humans' alteration of the land has led to widespread and/or long-lasting consequences. [3] These disasters have included deaths of wildlife, humans and plants, or severe disruption of human life or health, possibly requiring migration. [4] Some environmental disasters are the trigger source of more ...
Earthquake environmental effects are divided into two main types: Coseismic surface faulting induced by the 1915 Fucino, Central Italy, earthquake. Primary effects: which are the surface expression of the seismogenic source (e.g., surface faulting), normally observed for crustal earthquakes above a given magnitude threshold (typically M w =5.5 ...
The International Atomic Energy Agency notes "1800 documented cases of thyroid cancer in children who were between 0 and 14 years of age when the disaster occurred, which is far higher than normal", [27] although this source fails to note the expected rate. The childhood thyroid cancers that have appeared are of an aggressive type but, if ...
The term "disaster" itself is defined as follows: "Disasters are serious disruptions to the functioning of a community that exceed its capacity to cope using its own resources. Disasters can be caused by natural, man-made and technological hazards , as well as various factors that influence the exposure and vulnerability of a community."
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The oil slick as seen from space by NASA's Terra satellite on 24 May 2010. The 2010 Deepwater Horizon oil spill in the Gulf of Mexico has been described as the worst environmental disaster in the United States, releasing about 4.9 million barrels (210 million US gal; 780,000 m 3) of crude oil making it the largest marine oil spill in history.