Ecology

ecology, for Russian 9 form

An online crossword puzzle with 10 words. Play it free at AgileCrosswords.com.

Clues

The natural conditions, such as air, water, and land, in which people, animals and plunts live.
a substance used in or produced by chemistry.
a piece of paper which forms a cover.
esp. BrE waste material, e.g. from a house or office to be thrown away.
waste, such as empty packets, bottles and pieces of paper that people have dropped in the street.
the action of making (air, water, soil) dangerously impure.
esp. AmE waste material, e.g. from a house or office to be thrown away.
to treat a substance that has already been used, so that it is fit to use again.
to make less in size, ammount, price, degree...etc.
used, damaged or unwanted materials.