Earth Science Crossword

materials or substances such as minerals, forests, water, and fertile land that occur in nature and can be used for economic gain
a resource such as coal, gas, or oil that, once consumed, cannot be replaced
a resource which can be replaced
the maximum level at which a natural resource can be routinely exploited without long-term depletion
material or structure formed from loosely compacted mass of particles
solid rock underlying loose deposits such as soil or alluvium
the process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture
the commercially valueless material in which ore is found
a naturally occurring mineral containing a valuable constituent (such as metal) for which it is mined and worked
something which causes pollution
release of toxic chemicals into the atmosphere which deplete the ozone layer
the process of removing salt from seawater
the quantity of people earth and its resources can sustain
A factor whose effects on the size or growth of population vary with the population density
A factor that affects the size of a population independent or regardless of the population density
extremely rapid growth increase
the variety of life in the world or in a particular habitat or ecosystem
the use of either naturally occurring or deliberately introduced microorganisms or other forms of life to consume and break down environmental pollutants, in order to clean up a polluted site
clearing a wide range of trees
the cultivation of a single crop in a given area
the cultivation of waste land or land formerly under water
rainfall made sufficiently acidic by atmospheric pollution that it causes environmental harm, typically to forests and lakes
a gradual increase of the earth's overall temp. attributed to by the greenhouse effect
thick O3 layer which protects us from UV rays
fog or haze combined with smoke and other atmospheric pollutants
the source of pollution can be identified and traced back
pollution which doesn't have one identifiable source