VOA慢速英语:Turning Cigarette Butts to Batteries

litter – n.  things that have been thrown away and that are lying on the ground in a public place; v. to throw or leave trash on the ground in a public place

creative – adj.  having or showing an ability to make new things or think of new ideas; creativity - n.

potential – n.  existing in possibility; capable of development into actuality

conduct – v.  to have the ability to carry something (as light, heat, sound, or electricity)

convert – v.  to change (something) into a different form or so that it can be used in a different way