How have human actvities contributed to the phenomenon known as the global warming?

Question

How have human actvities contributed to the phenomenon known as the global warming?

Answer 1

Of course.

Answer 2

No one knows.  Mankind's burning of fossil fuels may be significant or may be swamped by natural processes.

For an idea of how vast natural processes are, see the following for a view of the carbon cycle:

http://www.grida.no/climate/vital/13.htm

Just the uncertainties in deep water carbon completely swamp mankind's contribution.

Burning fossil fuels releases carbon dioxide (CO2) into the atmosphere, soot into the atmosphere that has changed the albedo (reflectiveness) of the arctic, and sulfate aerosols that may have had a cooling effect.

The earth has undergone past cycles of warming and cooling and glaciation, that no one can explain to this day.  Since no  one can explain the past, any theory will do to explain the present.   And A LOT of theories have been proposed.  AGW is one of many.

Answer 3

No actually I have done a lot of research on this subject and surprisingly a lot of the evidence shows that global warming is not really a concern to people.

Answer 4

Global warming, CO2 production and the Bio fuels craze are what is called “Bias Science” Taking statistical data from a narrow set to prove their point.

   A good example of this is the increase CO2 in the earth’s atmosphere. After H20

(Water vapor) CO2 is produced by volcanic and tectonic action in vast amounts.  Mt St Helens during her last eruption Emitted 22,000,000 Kg per day of CO2 during her last eruption cycle. That went on for MONTHS.  Now times this by all the other volcanic eruptions, all the CO2 produced by other geologic events (Hot springs oil and natural gas seeps) plate tectonics’ you start seeing that mother earth is the biggest CO2 offender out there.

   By the way did you know that one of the biggest reasons why they say there is global warming is because the amount of CO2 seen in the Hawaii islands on top of Mona Loa?

  What they forget to tell you is that Mona Loa is an active volcanic mountain with 3 volcanic ranges!

They also forget to tell you that unless someone funds a study they won’t do it. That is why you don’t see CO2 sensors on all these active volcanos’s because the money is not there to pay for the scientists to show how much CO2 is being produced.

   Man’s only effect on global warming is being caused by the reckless destruction of the rain forests to produce bio-fuel.  Bio fuel produces CO2 in its process and uses about 30 gallons of pure fresh water to make 5 gallons. The waste emits CO2 and is a bio hazard.

  If you want to stop mans effect on CO2  production, stop cutting down the rain forests and go nuclear, boycott China because the use dirty coal to produce energy and have no emissions standards in place.

   Do some studying on the 1970’s and global cooling, you will find out that they are using the same science for different reasons.

Answer 5

As the result primarily of human-caused emissions, our climate is changing. It is becoming less stable, more volatile and warmer: global average surface temperatures have increased by 0.74 degrees Celsius during the past 100 years. Seasons are arriving at different times as normal variations are increasing; glaciers are receding; sea levels are rising. It is likely that extreme weather events are becoming more frequent and more severe. Droughts, floods and heat waves are already contributing to crop failures, conflicts and a steadily increasing toll of death and human suffering. As the planet warms it is highly likely that there will be an increase in the frequency and severity of floods and droughts in many regions.I think that global warming is a real issue that should be a concern to us all now and is only going to get worse, rapidly.

However, I think that people are getting confused by the expanding population, the planets inability to support us, the wiping out of the fish stock, the extinction of flora and fauna, coral bleaching, expanding desert, arctic ice melting, third world debt, poverty and starvation, illeagal logging, multi drug resistant TB, and all the other issues facing humanity and then pushing them all together and labeling it as "global warming". Some of these issues are a result of man made climate change and some are the result of 6.6 BILLION people destroying the environment.

And then they see the problem as to big to start fixing, so, therefore there is no point to do anything about it as no one else is, etc. However all these issues can be broken down and we ,collectively, could go someway to solving them. However, unfortunately, we are human and historically, when ever there has been a time to band together for the good of all, we have choose to bomb, kill, invade, and attack and take what ever we wanted from are neighbors. *Sigh*.

Check this out its really cool and puts things into perspective. click on the now button and it will all zero.

http://www.peterrussell.com/Odds/WorldCl...

and have you watched this?

http://www.youtube.com/watch?v=bDsIFspVz...

And some really cool movies.

http://www.uctv.tv/search-details.asp?sh...

(interesting)

http://www.indybay.org/newsitems/2006/04...

(interesting and funny)

Answer 6

Some gases ("greenhouse gases") let sunlight in, which warms the Earth, and then block that heat from leaving. That's the "greenhouse effect", and it's a natural thing, mostly caused by water vapor.

Man is making excessive amounts of greenhouse gases, mostly by burning fossil fuels. That causes the delicate natural balance to go out of whack and the Earth warms. That's global warming.

It won't be a Hollywood movie style disaster. Gradually coastal areas will flood and agriculture will be damaged. But it will be very bad. Rich countries will cope, but it will take huge amounts of money. In poor countries many people will die of starvation, but not all of them.

Most scientists say, in 20-50 years. But we need to start right now to fix it, fixing it will take even longer than that.

Really good website for more information here:

http://www.nrdc.org/globalWarming/f101.a...

Lots of numerical scientific data proving it real here:

http://en.wikipedia.org/wiki/Image:Clima...

http://www.ipcc.ch/pdf/assessment-report...

Proof that most scientists think it's real and mostly caused by us here:

http://en.wikipedia.org/wiki/Scientific_...

http://www.sciencemag.org/cgi/content/fu...

Answer 7

There used to be particles in fridges that could survive at very low temperatures and pressures. When they got up high into the atmosphere they caused a hole in the ozone layer. The ozone layer protects the earth from solar radiation (from the sun). A majority of this radiation is absorbed by the Earth and warms it.

Fortunately the ozone layer can repair itself and is getting smaller.

Unfortunately some rouge traders still sell these fridges and some third world countries governments don't strictly enforce the ban of these type of fridges.