5. Resource depletion is the exhaustion of raw materials within a region.
[citation needed] Resources are commonly divided between renewable
resources and non-renewable resources. Use of either of these forms of
resources beyond their rate of replacement is considered to be resource
depletion.
6. Pollution is the introduction of contaminants into the natural environment that
cause adverse change. Pollution can take the form of chemical
substance or energy, such as noise, heat or light. Pollutants,, the components of
pollution, can be either foreign substances/energies or naturally occurring
contaminants. Pollution is often classed as point source or nonpoint resource
pollution.
7. Climate change is a significant and lasting change in the statistical distribution
of weather patterns over periods ranging from decades to millions of years. It may be a
change in average weather conditions, or in the distribution of weather around the average
conditions
8. Waste management is the collection, transport, processing or disposal, managing and
monitoring of waste materials.. All waste materials, whether they
are solid, liquid, gaseous or radioactive fall within the remit of waste management a
9. Invasive species, also called invasive exotics or simply exotics, is a nomenclature
term and categorization phrase used for flora and fauna, and for specific
restoration-preservation processes in native habitats, with several definitions.
10. A flood is an overflow of water that submerges land which is normally dry. In the
sense of "flowing water", the word may also be applied to the inflow of the tide.
Flooding may occur as an overflow of water from water bodies, such as a river or
lake , in which the water overtops or breaks levees, resulting in some of that water
escaping its usual boundaries or it may occur due to an accumulation of
rainwater on saturated ground in an areal flood.
11. Global warming is the rise in the average temperature of Earth's atmosphere and
oceans since the late 19th century and its projected continuation. Since the early
20th century, Earth's mean surface temperature has increased by about 0.8
°C (1.4 °F), with about two-thirds of the increase occurring since 1980.
12. Acid rain is a rain or any other form of precipitation that is unusually acidic,
meaning that it possesses elevated levels of hydrogen ions. It can have harmful
effects on plants, aquatic animals, and infrastructure. Acid rain is caused by
emissions of sulfur dioxide and nitrogen oxide, which react with
the water molecules in the atmosphere to produce acids. Governments have made
efforts since the 1970s to reduce the release of sulfur dioxide into the
atmosphere with positive results.
