treys crossword

resources that exist without actions of humankind. This includes all valued characteristics such as magnetic, gravitational, and electrical properties and forces etc.
resource which can be used repeatedly and replaced naturally. Examples include oxygen, fresh water, solar energy and biomass. Renewable resources may include goods or commodities such as wood, paper and leather.
ecological yield that can be extracted without reducing the base of capital itself, i.e. the surplus required to maintain ecosystem services at the same or increasing level over time.
resource of economic value that cannot be readily replaced by natural means on a level equal to its consumption. Most fossil fuels, such as oil, natural gas
land degradation in which a relatively dry area of land becomes increasingly arid, typically losing its bodies of water as well as vegetation and wildlife.
solid rock underlying loose deposits such as soil or alluvium.
a whole formed by combining several (typically disparate) elements.
a naturally occurring solid material from which a metal or valuable mineral can be profitably extracted.
the commercially valueless material in which ore is found.
a substance that pollutes something, especially water or the atmosphere.
the presence in or introduction into the air of a substance which has harmful or poisonous effects.
process that extracts mineral components from saline water.
growth whose rate becomes ever more rapid in proportion to the growing total number or size.
the number or quantity of people or things that can be conveyed or held by a vehicle or container.
weather and climate, exert their influences on population size regardless of the population's density.
factors whose effects on the size or growth of the population vary with the population density.
the process of claiming something back or of reasserting a right.
the variety and variability of life on Earth.
the cultivation of a single crop in a given area.
cutting down of trees
use of microbes to clean up contaminated soil and groundwater. Microbes are very small organisms, such as bacteria, that live naturally in the environment.
mixture of smoke and fog
inorganic molecule with the chemical formula O 3. It is a pale blue gas with a distinctively pungent smell.
climate change, is the observed century-scale rise in the average temperature of the Earth's climate system and its related effects. Multiple lines of scientific evidence show that the climate system is warming.
Any form of precipitation, including rain, snow, hail, fog, or dew, that is high in acid pollutants, especially sulfuric and nitric acid.
any single identifiable source of pollution from which pollutants are discharged, such as a pipe, ditch, ship or factory smokestack
affects a water body from sources such as polluted runoff from agricultural areas draining into a river, or wind-borne debris blowing out to sea.