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Science has not at present the intelligence or competence to predict the future in any matters including Climate Change
Scientists in large numbers are telling us that we humans are causing climate change and this may very well be true
But Scientists go on to develop a number of scenarios which they term the future, in fact, far into the future, by several hundred years. These scenarios are just that ideas and intellectual speculations
Now Scientists are in fact (and science must always work with facts to be Science and not superstition) working on the assumption or speculation (which is not scientific, that is not fact) that the Earth's population has increased exponentially with out interruption since humans first appeared on the Planet and will continue to increase like bacteria in the future.
I content that any estimates of the population of the Earth before the year 1300 to be guesswork or speculation, which is an opinion based on incomplete facts or information.
Likewise any estimate of the Earth's population in the next several centuries are to be based on opinion and incomplete facts or information.
Remembering of course that the Earth's population is only one variable in the scenarios for the future, scientists are giving themselves a holiday for many centuries and stating that no discoveries will be made to solve this problem in the next several centuries.
If humans are responsible for climate change then scientific advances (use of oil and coal etc) are the cause and so scientists are obliged to come up with a solution.
It is amazing to me that scientific speculation is taken so seriously and with so little thought, where is the Ice Age science predicted in the 1960's?
Science predicts e.g. that we will live to 150 years old, ensure that that logical thinking is always with you.