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Concept of an environment

Throughout history humans have influenced and been influenced by the natural world. While much of our impact has been detrimental to the naturalenvironment, we have preserved and protected certain resources that are important to us. The environment, while highly valued by most, is used andaltered by a wide variety of people with many different interests and values. Difficulties remain on how best to ensure the protection of our environment andnatural resources, and how to divide the earth’s resources equally so that all benefit, and not just a select few.

There are currently many uncertainties regarding the future of the natural environment. However it is clear that humans have had a role in its destructionand will be responsible in the future for its conservation. Environmental problems are becoming more and more complex, especially as issues arise on amore global level, such as that of atmospheric pollution or global warming. There is a realization that such complex problems will demand complex solutionsand the participation of all.

The challenge is to find approaches to environmental management that give people the quality of life they seek while protecting the environmental systems thatare also the foundations of our well being. In order to face these challenges, students today will need more than superficial knowledge or awareness ofdisconnected environmental issues. A multidisciplinary approach to learning can build upon the strengths of a wide range of fields of study, providing a deeperunderstanding of the technological, political, and social options and strategies for both studying and managing the relationship between our societyand the environment. There will always be tradeoffs and, many times, unanticipated or unintended consequences.

Abiotic and biotic factors: effects on the community

There a number of characteristics of your local environment that can be classified into three broad categories, which can be called the“ABC’s of the environment.”

In the ABC’s of the environment,

A-refers to the abiotic (physical, non-living) features of the area

B- identifies the biotic (plant and animal) component of the environment.

C-C is the cultural (human) influences.

Some ecologists think of the ABC’s as forming a triangle with inter- relating sides. In a civilization as complex as ours, no single side can existuninfluenced by others.

How humans have an impact on the environment

The effect of humans on the composition of the atmosphere and the climate

This section will summarize some of the impacts that human’s have had on the environment. In particular we will look at the effect of humans on ourabiotic (non-living) environment.

Summary

Ozone Depletion: the ozone layer which prevents UV light from entering the earth’s surface is being destroyed by CFC’s and pollution

Greenhouse Effect: The UV light is being trapped within the earth’s atmosphere by a “blanket” of carbon dioxide and other greenhouse gasses, such asmethane and nitrous oxide. The main greenhouse gases are carbon dioxide and methane. They absorb much of the energy radiated from Earth and then re-radiateit back to Earth. The levels of these gases in the atmosphere are slowly rising. Carbon dioxide is produced when fossil fuels are burnt. Methane isreleased by cattle and from rice fields. An increase of only a few degrees Celsius may cause big changes in the Earth’s climate, upsetting weatherpatterns and affecting the types of crops that can be grown in different parts of the world. Polar ice caps may melt, causing the sea level to rise.

Questions & Answers

how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Good
Berger describes sociologists as concerned with
Mueller Reply
Comment on the ozone depletion over the period of 1982 to 1996
Mpho Reply

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Source:  OpenStax, Siyavula: life sciences grade 10. OpenStax CNX. Apr 11, 2012 Download for free at http://cnx.org/content/col11410/1.3
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