In keeping with the concern about radiation fall-out, perhaps teachers would like to introduce, and hopefully create, some inquiries as to ways our environment can help solve some of the problems of radioactivity, toxic wastes and spillovers from nuclear disasters.
One place to begin is the Science NetLinks pod cast on Zeolites being used to trap radioactive waste. You can find this Podcast as one of the many resources being showcased on the homepage of Thinkfinity under Nuclear Energy.
Another area for the students to investigate is the way that Russians in the Eastern area are monitoring their water-purification plant by using Mollusks. These mussels are very sensitive to change in water conditions, and will close their shells as soon as they detect contaminants in the water. This sends an immediate signal to the plant operator. Currently, the radiation level for the east Russian area is still within normal levels according to scientists.
This exercise in challenging students to come up with other resources that can be used to help clean the environment might be a "hook" to get kids more interested in becoming scientists. Also remind the students of the positive Cost/Benefit relationship here. Throw this concept out to your class to discuss. "Resources Are Not, They Become."