Paragraph 2
 
						  
						  
						  
						  
						  
Scientists believe wild boars have remained so radioactive because of their 
 of truffle mushrooms. Radioactive 
 accumulate in these underground 
, which the boars eat. The 
 of caesium in boars make the animals too 
 to be eaten. This has led to a reduction in the 
 of the animals and a 
 of their numbers. A geochemist asked why the 
 of nuclear weapons testing on the environment has been "under-studied and 
 forgotten". He said caesium soil pollution will "haunt 
 to come".