How will this ash cloud from the Iceland Volcano effect the United States environmentally?

I have read various reports from different media sources on the topic, and the general consensus so far is that the effects remain unknown. Many are speculating about the effects that the ash cloud could have on air quality and people's health. While some scientists say that volcanic ash poses no real health threat, and even the World Health Organization says there is no imminent risk YET, others say that the ash cloud can cause breathing problems in children, people with asthma, and others with respiratory ailments.

These researchers also point out that volcanic ash consists of a combination of sand, rock, and volcanic glass, and that the risk of damage to the respiratory tract can potentially be a real health threat. However, the effect on overall air quality remains unclear. The volcanic ash that has already spread to parts of Europe have affected the sunsets and the amount of daylight hours, but no one knows for sure how long the impact will last.

The main reason that this has affected airline travel so much is that the volcanic ash tends to make its way into the jet stream. Not only can this interfere with visibility, but it can also affect the health of those on board and spread the volcanic ash further. Some speculate about whether the volcanic ash will reach the US at all, and scientists point out that even if it does not right away, the ash that makes its way to the ocean and the atmosphere can become absorbed by clouds and fall in the form of precipitation many miles away.

This has happened many times throughout history, however, and there have been no real apocalyptic effects of these kinds of natural disasters. In fact, in places like Hawaii, the volcanic ash from eruptions that occurred centuries ago allow for some of the most suitable soils in the world. Some environmental groups are speculating that what caused the eruptions was actually global warming, but a number of scientists and geologists have stepped forward to dispute these kinds of claims.

These scientists point out that what is happening deep beneath the Earth's surface has very little to do with what is happening in the atmosphere itself. Attached is a CBS News report video on the global impact of volcanic ash.

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