“Human influence” is unquantifiable

Weather with sublime sunburst. Human influence still undetectable.

Three of the world’s most distinguished scientists, Professors Happer, Koonin and Lindzen, recently offered as evidence in a Californian court a “Climate science overview”. It begins:

Our overview of climate science is framed through four statements:

  1. The climate is always changing; changes like those of the past half-century are common in the geologic record, driven by powerful natural phenomena.
  2. Human influences on the climate are a small (1%) perturbation to natural energy flows.
  3. It is not possible to tell how much of the modest recent warming can be ascribed to human influences.
  4. There have been no detrimental changes observed in the most salient climate variables and today’s projections of future changes are highly uncertain.

The third statement is crucial to the Paris Agreement. Continue Reading →