1. A Humanity is not responsible for climate change
About global warming now spoken and written much. Almost every day ,new
hypotheses are refuting old ones. We were constantly afraid of the fact that will be
tomorrow .Many statements and articles openly contradict each other, misleading us.
Global warming for many has become a "global confusion", and some have lost all
interest to the problem of climate change. Try to systematize the available
information, in order to create a picture.
Global warming - the gradual increase in the average annual surface temperature of
Earth's atmosphere and oceans, due to all sorts of reasons (increased concentrations of
greenhouse gases in the atmosphere, changes in solar or volcanic activity, etc.). Very
often as a synonym for global warming use the phrase "greenhouse effect", but
between these concepts a little difference. Greenhouse effect - is the increase of
average annual surface temperature of Earth's atmosphere and oceans due to the
increase in the Earth's atmosphere concentrations of greenhouse gases (carbon
dioxide, methane, water vapor, etc.). These gases act as a film or glass greenhouses
(greenhouse), they are free to miss the sun's rays to the Earth's surface and trap heat,
leaving a planet's atmosphere. First of global warming and the greenhouse effect
began talking in 60th years of XX century, and at the UN global climate change was
first announced in 1980. Since then, on this problem, many scientists racking their
brains, often mutually refuting theories and assumptions of each other. Until now,
scientists with 100% certainty can not say what the causes of climate change. As the
causes of global warming pushed many theories and assumptions.
Hypothesis 1 - The cause of global warming is a change in solar activity
All ongoing climatic processes of the planet depend on the activity of our star - the
Sun. Therefore, even small changes in solar activity will certainly affect the weather

2. and climate of the Earth. Isolated 11-year, 22-year-olds and 80-90 summer
(Glaysberga) cycles of solar activity.
It is likely that the observed global warming is due to another increase in solar
activity, which in the future may again begin to subside.
Hypothesis 2 - The cause of global warming - to change the angle of the Earth's axis
and its orbit
Yugoslavian astronomer Milankovitch suggested that cyclical climate change is
largely due to a change in the Earth's orbit around the Sun, as well as changing the
angle of inclination of the axis of rotation of the Earth relative to the Sun. Such orbital
changes the position and motion of the planet causes a change of the radiation balance
of the Earth, and hence its climate. Milankovitch, guided by his theory, quite
accurately calculate the time and the length of the ice ages in the past of our planet.
Climate change, caused by changes in Earth's orbit, usually occur over tens or even
hundreds of thousands of years. Observed at the same time a relatively rapid climate
change apparently, is due to the action of some further factors.
Hypothesis 3 - The culprit of global climate change - ocean
Ocean - huge, slow-battery solar energy. It largely determines the direction and speed
of the warm ocean, as well as the air mass in the world, which strongly influence the
climate of the planet. Currently, little studied the nature of thermal circulation in the
ocean water column. So we know that the average temperature of ocean water is 3,5 °
C, and the land surface of 15 ° C, so that the intensity of heat exchange between the
ocean and the thickness of the surface layer of the atmosphere can lead to significant
climate change. Furthermore, in the ocean dissolved therein large quantities of CO2
(about 140 trillion. Tons, 60 times more than the atmosphere), and several other
greenhouse gases from certain natural processes, these gases may be released into the

3. atmosphere, significantly affecting Earth's climate.
Hypothesis 4 - Volcanic activity
Volcanic activity is the source of the Earth's atmosphere aerosols of sulfuric acid and
large amounts of carbon dioxide, which can also significantly affect the Earth's
climate. Large eruptions originally accompanied Cooling due to entering the Earth's
atmosphere sulfuric acid aerosols and soot particles. Subsequently, during the
eruption incoming CO2 causes an increase in the average temperature on Earth.
Subsequent long-term reduction in volcanic activity increases the transparency of the
atmosphere, and hence the increase in global temperature.
Hypothesis 5 - All the fault of people
The most popular hypothesis to date. High speed climatic changes in recent decades,
can actually be explained all the increasing intensification of human activities, which
has a significant impact on the chemical composition of the atmosphere of our planet
in the direction of increasing its content of greenhouse gases. Indeed the increase in
average temperature of the lower atmosphere of the Earth at 0,8 ° C over the last 100
years - the speed is too high for natural processes in Earth's history before these
changes took place over thousands of years. Recent decades have added further
weight to this argument, as the average air temperature changes occur even more
rapidly - 0,3-0,4 ° C over the last 15 years!
By admitting this arguments, we can believe that humans are not responsible because
compared to the size of the Earth, human activity is pathetically small. We don't cause
it. We do contribute to it. Global warming has been happening for a long time and it
started before humans existed. Meaning that global warming happens from nature.
Humans may have speed up the process a little bit but it is mainly nature and the
outside environment. This planet has gone through many ice ages before humans were

4. here. Global warming is probably happening, but I do not believe that it is the fault of
humans. This planet has not had the same climate through it's entire existence. It has
warmed up and cooled down many different times and I think that we are in one of
the warming cycles. Also I question the accuracy of the thermometers they used 100
years ago to even think that the entire world is warming up.

5. References:
Benestad, R. E. (2002), Solar Activity and Earth's Climate, Springer, New York.
Seth D.Baum, Jacob D. Haqq-Misra, Chris Karmosky (2012), Climate change :
Evidence of Human Causes and Arguments for Emissions Reduction, Sci Eng
Ethics,18, p.398.
Scott G.Mcnall (2011). Rapid Climate change. New York. Routledge.