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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

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
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
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
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.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
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.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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why and for what was five kingdom of classification of organisms introduced
give the ans as fast as possible
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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