No. Question Page 



95. Are radioactive wastes disposed in the ocean? If so, where 



and how, and are there any latent dangers involved? 114 



96. Why isn't there more interest and activity in recovery of 

 sunken ships and treasure? 115 



97. What types of organisms, other than sharks, are poten- 

 tially dangerous to swimmers? 117 



98. How much electricity does an electric eel generate? 118 



99. How are ships protected from corrosion and fouling? .... 119 

 100. What causes the hydrogen sulphide concentration at the 



bottom of the Black Sea? 120 



