Debris

trash, garbage, waste, rubble, leftovers, dead trees, branches on the ground, old satellites in space etc.


http://en.wikipedia.org/wiki/Debris

http://www.thankyouocean.org/threats/marine-debris/

http://www.epa.gov/gmpo/edresources/debris_t.html

http://www.sciencenewsforkids.org/2011/09/wanted-garbage-collectors-in-space/

http://coolcosmos.ipac.caltech.edu/cosmic_kids/AskKids/debris.shtml

http://www.kidswb.com/games/debris-derby

http://education.nationalgeographic.com/education/encyclopedia/marine-debris/?ar_a=1

http://www.epa.gov/gmpo/edresources/debris_t.html

http://marinedebris.noaa.gov/outreach/activity.html