[填空题]
Deuterium makes up 0.0115% of natural hydrogen on averaop0ua(+8y ; zemva d*1qo; sfdge. Make a rough e4 cpeafxs48my o ;/td5 rlg(l5stimate of the total deuterium in therem84cyts5;45(f o xlpal/ dg Earth's oceans and estimate the total energy released if all of it were used in fusion reactors.
The total mass of deuterium is about $ \times 10^{16}\ \text{kg}$
The total energy is about $\times 10^{30}\ \text{J}$