They Did Try To Tell Us

With the IPCC Climate change report making for some very uncomfortable reading about what we are facing, nobody can say we weren't warned.

1824 - French physicist Joseph Fourier warns of the Earth's natural 'greenhouse effect'.
1861 - Irish physicist John Tyndall shows that certain gases create the greenhouse effect.
1896 - Swedish chemist Svante Arrhenius concludes that industrial-age coal burning will enhance the 'man made greenhouse effect' and raise temperatures by a few degrees Celsius
1900 - Swede, Knut Angstrom, discovers that even at the tiny concentrations of certain gases can produce greenhouse warming.
1938 - British engineer Guy Callendar shows that temperatures had risen over the previous century caused by CO2 concentration.
1955 - US researcher Gilbert Plass announces that CO2 concentrations could increase temperatures by 3-4C.
1957 - US oceanographer Roger Revelle and chemist Hans Suess state that 'Human beings are now carrying out a large scale geophysical experiment'
1958 - Charles David Keeling begins measurements of atmospheric CO2 concluding that CO2 concentrations are rising.
1965 - A US President's Advisory Committee panel warns that the greenhouse effect is 'a matter of real concern'.
1975 - US scientist Wallace Broecker publishes a scientific paper warning of the dangers of 'global warming'.
1988 - Intergovernmental Panel on Climate Change (IPCC) formed to collate and assess evidence on climate change.
1989 - UK Prime Minister Margaret Thatcher warns in a UN speech of CO2 in the atmosphere and calls for a global treaty on climate change.
1990 - IPCC report that temperatures have risen by 0.3-0.6C over the last century due to humanity's emissions.
1992 - At the Earth Summit in Rio de Janeiro, governments agree to 'prevent dangerous anthropogenic interference with the climate system'.
1995 - IPCC Report concludes that the evidence suggests 'a discernible human influence' on the Earth's climate.
1998 - UN report that the average global temperature reached 0.52C above the mean for the period 1961-90.
1998 - Publication of the 'hockey stick' graph indicating that modern-day temperature rise is unusual compared with the last 1,000 years.
2001 - IPCC report finds 'stronger evidence' that humanity's emissions of greenhouse gases are the main cause global warming.
2007 - IPCC's report concludes it is more than 90% likely humanity's emissions are responsible for climate change.
2008 - Keeling project shows that CO2 concentrations have risen from 315 ppm in 1958 to 380ppm in 2008.
2011 - UN Data shows concentrations of greenhouse gases are rising faster than in previous years.
2013 - The Mauna Loa Observatory reports that the concentration of CO2 in the atmosphere has surpassed 400ppm for the first time since measurements began.
2013 - IPCC's report says scientists are 95% certain that humans are the cause of global warming.

We really can't say that we weren't warned.