Because nanites are so small, they require little in the way of raw materials, just a few molecules here and there.
Clearly, what nanites will do inside our bodies in the future is almost limitless and will change medicine forever.
In the future, we will paint surfaces with substances full of nanites that will absorb sunlight and turn it into electricity, transforming any object we paint into a clean energy creator.
We will discuss the molecular machines called nanites—tiny, molecular-sized robots that will swim around in your body fighting disease, repairing damage, and alerting you to problems (and will likely dramatically increase the human lifespan).
Or how about nanites that process each piece of trash in our garbage and turn it into something useful?