Design of sustainability

I guess when someone says this, you just think of the 3 Ps, people, planet, profit.
The design of a product should be something, which helps all these things, people don’t want to lose money when making a product, the need to make a profit!
I guess people say “protect the environment” and what not, so they go into the design aspects of trying to protect our plant from the massive amounts of garbage we’re left with:

“According to the Environmental Protection Agency, the average American produces about 4.4 pounds (2 kg) of garbage a day, or a total of 29 pounds (13 kg) per week and 1,600 pounds (726 kg) a year”

http://www.wisegeek.com/how-much-garbage-does-a-person-create-in-one-year.htm

Seemly this is how much the average American leaves in a year, other sites like wiki said each UK person produces 1.5 tons of rubbish a year. The main job is just to produce items which really can eco friendly degrade. Of course, we do all this for the people of earth, but not just the people, the animals and plant life too.