 The authors ' say that nuclear power and clean coal are not clean technologies . Apart from the risks associated with nuclear power , " multibillion @-@ dollar nuclear plants are simply not cost @-@ effective when compared with other energy sources . " The authors also believe that clean coal is an oxymoron for a myriad of reasons , including the sheer number of coal mine @-@ related deaths and the fact that coal @-@ fired plants , even some cleaner ones , are major contributors to serious illnesses such as asthma , heart disease , and mercury poisoning . 
 The authors <a href='null_genetive' title='1'><mark>'</mark></a>say that nuclear power and clean coal <a href='negative_concord' title='2'><mark>are</mark></a> <a href='negative_concord' title='3'><mark>not</mark></a>clean technologies . Apart from the risks associated with nuclear power , " multibillion @-@ dollar nuclear plants are simply not cost @-@ effective when compared with other energy sources . " The authors also believe that clean coal is an oxymoron for a myriad of reasons , including the sheer number of coal mine @-@ related deaths and the fact that coal @-@ fired plants , even some cleaner ones , are major contributors to serious illnesses such as asthma , heart disease , and mercury poisoning . 
Da authors  say that nuclear power and clean coal ain't clean technologies . Apart from the risks associated with nuclear power , " multibillion @-@ dollar nuclear plants are simply not cost @-@ effective when compared with other energy sources . " The authors also believe that clean coal is an oxymoron fa a myriad of reasons , including tdasheer number of coal mine @-@ related deaths and the fact dat coal @-@ fired plants , even some cleaner ones , are major contributors to serious illnesses such as asthma , heart disease , and mercury poisoning .