Well behaved skeptics are supposed to nod their head and say :
Yes, humans have caused 0.7C warming by adding greenhouse gases, but future warming will be less than the models forecast
Or you could be an actual scientist and say
The global warming claims made by government scientists are almost completely due to UHI effects, high solar activity in the 20th century, and data tampering by government scientists.
The global temperature record claimed by government agencies is fraudulent. It shows the cold period of the early 1970s as being much warmer than the warm period of the early 1920s.
The US Weather Bureau said that the Arctic was rapidly melting during the 1920’s.
NOVEMBER, 1922. MONTHLY WEATHER REVIEW
THE CHANGING ARCTIC.
The Arctic seems to be warming up. Reports from fishermen, seal hunters, and explorers who sail the seas about Spitsbergen and the eastern Arctic, all point to a radical change in climatic conditions, and hitherto unheard-of high temperatures in that part of the earth’s surface.
Many old landmarks are so changed as to be unrecognizable- Where formerly great masses of ice were found, there ore now often moraines, accumulations of earth and stones. At many points where glaciers formerly extended far into the sea they have entirely disappeared.
The change in temperature, says Captain Ingebrigtsen, has also brought about great change in the flora and fauna of the Arctic. This summer he sought for white fish in Spitsbergen waters. Formerly great shoals of them were found there. This year he saw none, although he visited all the old fishing grounds.
There were few seal in Spitsbergen waters this year, the catch being far under the average. This, however, did not surprise the captain- He pointed out that formerly the waters about Spitsbergen held an even summer temperature of about 3 Celsius; this year recorded temperatures up to 15, and last winter the ocean did not freeze over even on the north coast of Spitsbergen.
The Arctic meltdown continued into the 1940’s.
By contrast, NCAR said that the Arctic was rapidly freezing up during the 1970′s
Climate Change and its Effect on World Food
by Walter Orr Roberts
National Center for Atmospheric Research, Boulder, Colorado
In February of 1972 earth-orbiting artificial satellites revealed the existence of a greatly increased area of the snow and ice cover of the north polar cap as compared to all previous years of space age observations ….. The Earth may have entered a new “little ice age”.
The CIA said that the Arctic was rapidly freezing up during the 1970′s
Early in the 1970s, a series of adverse climatic anomalies occurred. …. The world’s snow and ice cover increased by 10-15%.
It is not credible the the 1920s Arctic melt occurred at a lower temperature than the 1970s Arctic freeze. Science has actual rules, which must be adhered to – even by government scientists and well behaved skeptics.
In 1975, the National Academy of Sciences published the graph below, showing that the 1920’s were warmer than the 1970’s. That changed after Hansen got his hands on the temperature data in the 1980’s.