We would also have at our disposal flame-throwers, chemical warfare, and nuclear weapons.

我们还将拥有可供使用的火焰喷射器、化学武器和核武器。

And the tools that we have at our disposal to make better use of all that information, that's improving all the time.

我们所拥有的工具可以更好地利用所有这些信息，这些工具一直在改进。

And it's why I say cities are one of the most effective tools we have at our disposal for leveraging efficiency into our relationships with land, energy and waste.

这就是为什么我说城市是最有效的工具之一我们可以利用效率融入我们与土地、能源和废物的关系。