It's all of it.
Recently, a woman from Baltimore was on Oprah talking about how she had reduced her electric bill by 77% through unplugging things that pull an electrical load even when they're not being used. Whether you believe her actual performance or not, these two articles describe how it works and allow one to calculate how much could be saved.
So, what would motivate you to unplug a bunch of stuff? I've started unplugging nearly everything but for the alarm clock, the microwave (because it's impossible to get to) and the TV when I leave the apartment.
If you believe that global warming is bunkum, you won't be motivated to do this. If you hold a negative view toward trying to save money, or use less - you won't be motivated to do this.
What if Jesus said it was a good idea?
In Mark Chapter 12, Jesus was asked which was the most important of the Commandments. Most who are Christian or who have read the bible (note that I don't consider the two groups to be identical) are familiar with the story.
Here was the exchange:
29 And Jesus answered him, The first of all the commandments is, Hear, O Israel; The Lord our God is one Lord:
30 And thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind, and with all thy strength: this is the first commandment.
31 And the second is like, namely this, Thou shalt love thy neighbour as thyself. There is none other commandment greater than these.
Let's break this down for a moment -
The most important commandment is that there is one God, and you should focus on God. In my faith, we say "God is all there is", but in any faith - Christian, Jewish, Muslim, Buddhist .. we can all agree that the most important thing is that God is the most important thing.
What follows, though - "love thy neighbor as thyself. There is none other commandment greater than these".
Virtually every spiritual faith that has wide adherence contains this admonishment. Do unto others as you would have them do unto you. What goes around comes around. As you do, so shall you receive.
We humans find this to be an aspiration, but we do not live as if it were the second most important spiritual rule. We instead ignore God's admonition that judgment belongs only to God, and try to use the other commandments as weapons to justify our wrath.
What of the commandment "thou shalt not kill" from the perspective of the second most important commandment? One could reflect that being killed would be pretty bad, so since I don't want that done unto me, I should refrain from doing it to others.
Let's take "thou shalt not steal". Hasn't everyone come to realize that someone, maybe someone we thought of as a trusted person, has stolen from us? How does that feel? It feels rotten! So, when we see something tantalizing - how do YOU want to feel? You want to feel the way that the owner of that trinket will feel when they discover that you've taken it?
Well, then either mate it back with its owner or leave it alone.
Taken into a broader environment - no pun intended - what are you saying to your neighbor when you throw something out your car window instead of disposing of it in a waste container? How would you feel if someone tossed some trash in your yard? Or let their animal relieve itself on your sidewalk?
What's the difference?
What are we saying to our neighbors when we create an earthen pond containing three million gallons of toxic coal slurry to avoid dealing with the refuse from coal mining, and then it soils and nearly permanently destroys hundreds of acres, and displacing dozens of families and businesses?
What are we saying to our neighbors when we run our supertanker into a shoal, spilling several million gallons of crude oil onto public beaches, destroying wild life habitats and the living for local fishermen and then fight cleaning up after ourselves by spending more money than the clean up would have cost?
What are we saying to our neighbors not yet born when we overfish or pollute the waters such that there is no more food source? Or when we create a drug, or a beverage, or a processed food that is neglectfully or intentionally harmful and then do our best to avoid responsibility?
What if we conducted ourselves thinking about how WE would feel if we personally had to deal with the aftermath, the mess, the cleanup, the financial burden and then acted to minimize or eliminate any effect that our neighbor will be left with?
If we conducted ourselves that way, would we be honoring God and his creations more fully? Would we actually be living our lives following the teachings of Jesus?
Why, yes we would.
Could one then extrapolate a sound conclusion that littering, using more than you actually need, acting in a manner ignorant of how others are left responsible or diminished, or actively trying to avoid responsibility are against Jesus's primary teachings?
You tell me. I have my opinion on the matter already.