Letter writer William Lewis (March 16) made some good points, but still questions whether global warming exists. I believe that it does indeed exist.
To clarify, I can remember reading in a geology textbook — back in my Georgia Tech days in the 1970s — that, based on geologic evidence, we are in the “fourth interglacial warming period.” The textbook was, of course, written by well-respected geologists, and it was published in 1955. It said we can expect, as in previous warming periods, global average temperatures to rise, polar ice caps to melt, and sea levels to rise about 200 feet.
More recently, a research geologist (ironically, also from Georgia Tech) discovered and established that the Himalayan Mountains put out gas carbon at a rate greater than that produced by all the fossil fuels burned in the world. It has also been established that North America acts as a net carbon sink — general atmospheric movement over the continent is from west to east, and carbon levels are lower on the East Coast than on the West Coast.
All this forces me to conclude that a) global warming is real, b) human activities do not cause it, and c) there’s nothing we can do about it.
I can remember thinking years ago, “Let’s see … sea levels rising by 200 feet would be enough to submerge New York City, Los Angeles and Miami, and bring the beach up close to Macon … bring it on!”
Eugene W. Turner III