Part 1 - The Basic Elements
developer dɪˈvɛləpə(r) *
a person or thing
that develops something.
"a property developer"
a person who grows or
matures at a specified
time or rate.
"I was a slow developer"
a chemical agent
used for treating
photographic film
to make a visible image.
"photography paper in a
trough of developer"
google.com
The first part of this book pledge that sustainability should also be aplied to the self.