What percent of Global warming is caused by humans? and what is your source?

Answer 1

0%. The climate is controled by the Sun and goes in natural cycles.

The time around 1900 was cooler than normal
the time around 1930's was warmer than average
the 1970's were cooler than average
the 1990's was warmer
and soon we will discover the the Earth is starting to cool down.

Currently we can see this is happening. There hasn't been a warmer year since 1998.

Answer 2

First off, I LOVE Pico's answer.
Ok, guys, lets get serious here. Half the people in the IPCC aren't even scientists. And, many of the members who are scientists have disagreed with what was written in the report, but have still been listed as part of the "scientific consensus."
For more details, I recommend watching "The Great Global Warming Swindle," available on YoutTube and Google Video.
As to the actual percent, I'm sure there is some, but it would be very small. it says that a mere 2-3% of CO2 is anthropogenic (manmade), the rest coming from plant matter, volcanoes, and the ocean (again see "The Great Global Warming Swindle). If CO2 is the cause of this minor, one degree per century, warming trend that we are experiencing, then it's obvious that humans aren't the cause.

Answer 3

Impossible to determine precisely because of Solar activity but there is a growing General consensus such as in the recently released Oct 25 2007 Geo-4 Report which states that global surface Temperatures have risen 0.74 Cel. since 1904 and will rise from between 1.8 - 4 Cel. by 2100.Caused mostly by human activity.

Answer 4

I would have to say 50% human and 50% the sun. CO2 is not the only driving factor in Global Warming. You have variability in solar output that if you have this high output from the sun for a century that it will warm your climate. I feel that the 0.06% of the human released CO2 doesn't effect as much as people say. If that was the case then we would be warming at a steady rate I'm sure. Instead for the past century the temp has fluctuated but the overall temperature has risen.

Look at these charts and read the articles about the sun and you'll see a very good match up between SST and Sunspots.

http://www.oar.noaa.gov/spotlite/archive/spot_sunclimate.html

http://www.space.com/scienceastronomy/sun_output_030320.html

I just know that you cannot blame everything on humans. We play a role but we do not control everything about the climate.

Answer 5

Technically, it's climate change, which includes cooling trends as well as warming tends, a natural occurrence of the earth's environment.
"Global Warming" is just media hype designed to panic the flock into giving more money to the governments and large corporations.
Hence, 0%.

Answer 6

If you believe Al Gore and the IPCC (most of whom are not climatologists), global warming ins being caused solely by carbon dioxide produced by humnan activity.

Actual climatologists, however do not agree.
http://www.ncpa.org/ba/ba230.html

http://www.abcnews.go.com/2020/story?id=3061015&page=1

http://www.theforbiddenknowledge.com/hardtruth/global_warming_myths.htm

or take the global warming test

http://www.geocraft.com/WVFossils/GlobWarmTest/start.html

The best estimate is that human activity may acount for about 0.06 percent of the climate change. That includes all greenhouse gases generated as a result of human activity, reduction of carbon sinks by slash and burn agricultural, the heat island effect and other activitiies. An incomnvientient truth conviently makes some glaring ommisions of known scientific fact. For example, in comparing the patterns of average temperature with the co2 levels as recorded in glacial and polar ice core samples, the co2 levels actually lag behind the global temperatures by 800 years. In laymans terms, 800 years after a sudden increase in gobal average temperatures, there is a similar increas n the co2 levels. Mr Gore's graphs are conviently aligned to imply that the rate of change in the co2 level exactly match the rate of change in the global average temperature. From the doctored data, he makes the assumption that co2 is a causative factor and not an indicative one. Another problem is that correlations between to data sets to not show cause and effect. It is equally valid to assume that some other factor is the cause for both the warming trend and the co2 trends, or that the warming trend is somehow directly or indirectly causative of the co2 trend.
Finding alternative renewable energy will not save the planet from the effects of global warming. However it may save the human race from extinction. Humans have a unique ability to adapt the environment to themselves. To maintain these adaptions requires massive amounts of controllable energy. Through the use of fossil fuels, mankind has increased the ability of the limited farmland to provide much more food to feed an impossibly large population. Cheap controllable energy has become mankinds limiting factor. When the oil runs out, if no renewable substitute is found, most of mankind will die.

Answer 7

Global warming is caused by humans. Humans like Gore, Obama and Hillary. They want to scare us into thinking that the world is coming to an end because of evil republicans. They want you to think that the only way to save the world is to vote them in. The funny thing is that even with all the help from TV news and celebrities, it isn't working. They don't think we have minds of our own.

The same game was played back in the early 90's. All of my liberal teachers were preaching 'green' thinking. We had to 'save the world'. I remember coming home scared thinking that we were all going to die. Not true. Once Clinton got in... it all went away. The only way the dems can win elections is by trying to SCARE us all.

For those that read this and don't believe me. Just wait. If Hillary wins the election, all this 'green' talk will go away within a few months (unless they come up with some new 'green' tax...lol).

Answer 8

0% of global warming is caused by humans.

My source: 650 Million Years of geologic history.

Answer 9

0% is casued my humans. Common logic is my source. If you think about it the tempetature of the Earth has always been increasing or decreasing we are just in an increasing peroid right now. We have nothing to do with it.

Answer 10

According to the latest IPCC report, for the period 1750-2005 the combined of net anthropogenic climate forcings, from all sources, amounted to 1.6 Watts per square meter (-1.0, +0.8). The net of natural forcings (i.e., solar) amounted to 0.12 Watts per square meter (-.06, +.18).

This implies that humans are responsible for between 67% and 98% of global warming, with 93% being the most likely number.