Read here. As the scientists are now informing us, there are sources and factors totally out of the control of humans that are causing our climate to change, the same as they have done in the past.
Scientists are discovering that the level of solar activity determines how many cosmic rays strike our atmosphere, which then determines the extent of cloud coverage. Less clouds allow more sunlight to reach the surface, and more clouds reflect increased sunlight back to space. (click on image to enlarge)
As an example, early on August 4, 2010 a solar flare eruption struck Earth. The result was the quick reduction of cosmic rays striking the planet, as this chart from the Moscow Neutron Monitor shows.
"A paper published online today in the Journal of Geophysical Research, Atmospheres lends credence to the cosmoclimatology theory of Svensmark et al, finding that increases in galactic cosmic ray counts (GCRs) have a statistically significant correlation to increased cloud formation.....The theory of cosmoclimatology explains why small changes in total solar irradiance (TSI) during solar cycles may be amplified due to secondary effects on galactic cosmic rays and cloud formation: Even though solar irradiance only changes about .1% during a solar cycle, the secondary effects of changes in the solar magnetic field on GCRs can be up to 25% or more.....As proven empirically by the study published today, increases in GCRs seed more clouds which reflect more sunlight back into space ("albedo") and result in cooling of the earth. The study published today finds that a 15% increase in GCRs resulted in up to a 9% change in the "cloud index" which corresponds to an increase in cloud opacity."