Why might humans cause Climate change? what evidence is there?

[Levi H]

If you think that humans cause climate change, what evidence is there to support that?
If you think that humans don't contribute at all why is this? and what evidence is there for that?
Any more detail could be helpful, let me know your sources.
xx

 

[james e]

There is none about humans causing climate change and a whole lot about it being the sun. Our sun is a variable output star and it varies up to 10% above and below the mean. When it is in high mode like it was up until 3 years ago the planets in the solar system warm up. When it goes into a minimum like it currently is the planets cool down. Now normal minimums last from 2 cycles about 30 years to 4 cycles about 60 years if the sun has not dropped in to an extended minimum like it does during ice ages. The big concern amongst real scientists currently is how severe the current minimum might be and the problem is no one knows for sure what really causes minimums and maximums. If Jimmy carter had not shut down the solar power and food satellite program to please his boss the president of Exxon/Mobil we might have equipment in space by now to be able to determine what exactly causes our sun to warm up and cool down like it does causing hot periods and ice ages.


http://wattsupwiththat.com/2009/11/12/another-parallel-with-the-maunder-minimum/
http://www.stsci.edu/stsci/meetings/lisa3/beckmanj.html
http://www.deadfishwrapper.com/fish_wrapper_wont_publish_global_cooling_study
http://article.nationalreview.com/?q=NTlhOTNiOWFlMmMzNmJkOWM3ZTk5NWJkNTU2Nzk5NWI=
http://www.dakotavoice.com/2009/06/nasa-study-shows-sun-responsible-for-planet-warming/
http://en.wikipedia.org/wiki/Volumetric_heat_capacity
http://ossfoundation.us/projects/environment/global-warming/natural-cycle
http://www.c3headlines.com/climate-change-non-co2-causes/
http://green-agenda.com/globalrevolution.html

 

[zero-G]

I'm pretty sure that it wasn't wild animals who began the industrial revolution, invented cars, and produced CO2 emissions.

 

[Mad Max]

Humans of course cause climate change, sometimes locally, sometimes globally. Local examples are easy to come by, look at virtually any city and you will see a dramatic change in vegetation, animal life, water cycles, etc. Concrete Jungle as some call it.

Globally it is clear that humans have contributed significantly to the amount of CO2 in the atmosphere.
In 1958 the concentration of CO2 in the atmosphere was about 315ppm, today it is about 385ppm. This increase has closely mirrored our use of fossil fuels. We also have isotope studies that indicate that much of the increase is due to humans, and not natural sources of CO2.