Environmental Hazard Caused Adverse Health Outcomes in Humans, assignment help

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i have started the assignment but need help filling in the questions and adding references.

Thank you.

Significant
Episodes in which an Environmental Hazard Caused Adverse Health Outcomes in
Humans. 

The
three major and historical events that I have identified are the deadly gas
release of Bhopal, nuclear disaster at Chernobyl and the Hiroshima bombing. 

Which environmental hazard,
such as the pollutant or pollutants, caused the most adverse health outcomes
and why?

The deadly gas release of
Bhopal, India was made up of methyl isocyanate (MIC) gases that were expelled
into the atmosphere from a factory developing pesticides, which killed 3,800
people. There were several explosions
at the Chernobyl nuclear reactor that caused the radiation to leak out. The nuclear disaster in Chernobyl had
immediate effects on its victims as well as long term.  The bombing
at Hiroshima caused radiation to be emitted and caused radiation to be absorbed
into people, crops, animals, etc.

What
are the various adverse health outcomes that occurred as a result of exposure
to the environmental hazard?

The release of this hazardous
gas from the Bhopal incident caused many people to pass away from lung failure
and those that were able to live out the first couple of days had severe respiratory
complications as well as other life threatening symptoms. The long term effects from inhaling these gas
included brain related issues such as headaches, as well as effects on the
major systems of the body.

The nuclear disaster at
Chernobyl had devastating effects on the people that lived in Chernobyl as well
as the outlining countries such as Russia and the Ukraine.  The radiation expelled into the air and
caused many people to have radiation poisoning, develop cancers especially thyroid
as well other cancers.

The bombing at Hiroshima
showed effects on its victims such as radiation sickness and radiation burns on
the skin.

What
are the steps that were taken to prevent the adverse health outcomes from occurring?
Should there be any other step that was necessary to prevent the adverse health
outcome? Explain.

Suggest the ways to prevent future occurrences of such
episodes.

Is there an association between environmental hazards
and adverse health outcomes in humans? Why or why not?

Analyze and explain the exposure-disease relationship
for each of these three events.

What do you think is the impact of these events on the
communities where they occurred?