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Many people associate the greenhouse effect with global warming. In fact, there is so much confusion, that these terms are sometimes used interchangeably. Thegreenhouse effect is naturally occurring on most planets, and it is necessary on Earth to maintain life as we know it.

Without the greenhouse effect, the temperature of the Earth might be as much as 30˚C cooler! That would alter the surface of the Earth significantly,covering much of it with ice. We need the greenhouse effect to survive on Earth.

However, there can be too much of a good thing. Human beings have begun adding a large amount of greenhouse gases, primarily carbon dioxide, into ouratmosphere. This came mostly with the industrial revolution when we began to burn coal and gasoline, and now many other fossil fuels (such as propane,natural gases), and even wood, in great quantities. With this increase in carbon dioxide in our atmosphere, there is more gas to absorb energy. With moreenergy being absorbed, the temperature of the atmosphere is beginning to increase, causing changes within our weather patterns, and other influences onthe ecosystems of the Earth. This is called climate change.

In the past few decades the population of the Earth has doubled to over six billion people. These six billion people foster a large increase in automobiletransportation; the major source of the increase in greenhouse gases. The greater population has also required more resources such as land. Large amountsof forest have been cut down. Trees are one of the most important organisms that actually remove carbon dioxide from the atmosphere during photosynthesis.So not only are humans adding more carbon dioxide to the atmosphere, but they are also destroying trees that would otherwise be helping to absorb excesscarbon dioxide from the atmosphere.

We will not know the full impact of global warming until perhaps the middle of this century. This is because it takes so long for the full impact to be felt.You may remember that water vapour and carbon dioxide are a very small part of the makeup of our original atmosphere (see Module 5, Tutorial 1). So as we addcarbon dioxide from burning fossil fuels there is only a very small change in the makeup of our atmosphere. In fact it takes a long time for the atmosphereto mix in the added greenhouse gases fully. Scientists say that even if we halted the release of greenhouse gases today, the climate would continue towarm until about the year 2050 as the atmosphere reaches a new stable state.

The effect of humans on biodiversity

This section will summarize some of the impacts that human’s have had on the natural environment, focussing on our impact on the biotic (living)environment.

Summary

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

Introduction of alien invasive species: These are plants and animals that are NOT indigenous to a particular country. The plants and animals grow rapidly as they are alien and have no naturalpredators to feed on them.

Questions & Answers

what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
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
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
why and for what was five kingdom of classification of organisms introduced
SUBHIKSHA Reply
give the ans as fast as possible
SUBHIKSHA
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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