natural resources

Something, such as a forest, a mineral deposit, or fresh water, that is found in nature and is necessary or useful to humans.

natural resource. (n.d.) American Heritage® Dictionary of the English Language, Fifth Edition. (2011). Retrieved September 28 2015 from

energy consumption [cite]

Source: U.S. Energy Information Administration

biogasbus [cite]

Image courtesy of Nancy Tuchman

plastic recycling [photo]

Figure 27: The majority of plastic packaging is made with one of six plastic resins: polyethylene terephthalate (PETE); high density polyethylene (HDPE); polyvinyl chloride (PVC or vinyl); low density polyethylene (LDPE); polypropylene (PP); or polystyrene (PS). All other plastics are classified as “other” and are assigned SPI number 7.[fn][[nid:1660]][/fn]

deforestation [cite]

By jidanchaomian [CC BY-SA 2], via Wikimedia Commons