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Global warming: refers to increase in earth’s temperature due to the greenhouse effect

Deforestation: removal of natural forests. This destroys biodiversity, and also removes plants which help to decrease the carbon dioxide burden.

Acid Rain Burning fossil fuels may also produce sulphur dioxide and nitrogen oxide gases. These gases rise up in the atmosphere from factories, power stations andvehicles and dissolve in the water in clouds forming acid rain. Acid rain can damage trees directly.If the water in rivers and lakes becomes too acidic,plants and animals cannot survive. Acid rain also damages buildings

Destruction of biodiversity - hunting, pollution, destruction of the natural environment and introduction ofalien species can result in the extinction of native species.

Definitions and terms

Greenhouse gases: Methane, nitrous oxide, carbon dioxide

Fossil Fuels: Natural substances made deep within the earth by the decomposition of plants and animal remains over millions of years

The greenhouse effect

http://www.curriki.org/xwiki/bin/view/Coll_Athabasca/Unit5-Lesson3TheGreenhouseE ffect

With the rise to prominence of the issue of global warming, it is important to discuss the greenhouse effect. The name comes from the everyday concept of agreenhouse, where sunlight is allowed to pass through transparent panels and shine on the plants inside. This provides energy to the plants, but also warmseverything inside the greenhouse. With the sealed layer of transparent panels, the warmth is trapped inside and the greenhouse becomes much warmer than theenvironment outside.

The Earth’s atmosphere functions exactly like this, except there are no transparent panels. When sunlight shines down on the Earth, most of it isabsorbed on the surface, giving us warmth and energy. Some of the light is absorbed by the atmosphere before it hits the surface, and a very small amountof the light is also reflected back off the surface toward outer space. Additionally, the surface of the Earth releases heat into the atmosphere, suchas can be seen over a road on a hot day.

The greenhouse effect is not limited to Earth. Any planet that has a significant atmosphere has some kind of greenhouse effect. Venus has a significantgreenhouse effect that keeps the surface of the planet extremely hot, averaging around 460˚C. A probe that was sent to study the planet survived for onlytwo hours before melting, even though it was designed with durable metals.

With the reflection of light off the surface and the surface radiation of heat, much of the energy from sunlight would be lost back to space. Fortunately theatmosphere acts like the transparent panels from the greenhouse trapping the heat. Natural gases in our atmosphere called greenhouse gases (such as carbondioxide and water vapour) are extremely good at absorbing various kinds of sunlight. So, rather than escaping back into space, much of this reflectedlight and heat is actually absorbed by the greenhouse gases. This has a significant warming effect on our atmosphere.

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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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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