Very gentle and polite rebuttal here:
by Robert P. Smith, Ph.D., P.E.
As a long-term subscriber to Practical Winery & Vineyard Journal I have always looked forward to the regular features of Dr. Richard Smart. Sunlight Into Wine was a landmark contribution to viticulture.
Nevertheless, I was surprised and disappointed to read his article “Reducing CO2 – the REAL pollutant” in the Spring 2011 edition. As an environmental scientist and engineer, I am particularly attuned to the use of the word “pollutant.” I have spent my professional career dealing with real pollution, so when I see CO2 – an essential and beneficial substance in our environment – so characterized, I am compelled to respond.
As we both know – or should know – carbon dioxide is plant food. Other nutrients are needed, but CO2 is a plant’s only food, it cannot survive without it. Carbon dioxide – replenished through the carbon cycle – is the source of the carbon utilized to produce carbohydrates through photosynthesis. Without plants of course, we animals could not survive. (SPPI)