Quake/Tsunami

[Lamplighter]

How about ....

...start the delicate and risky task (untested and dangerous)
...to release radioactive materials beyond the plant(environmental disaster)
...very big risks involved(extremely dangerous)
...a more dangerous chain of events (environmental disaster with lethal/genetic damage to people)

etc., etc., etc.

What point are you making ?
Mine was very simple
... most every sentence and paragraph was written in such styles
which tend to down play or minimize the reader's responses.