by Vincent
Ocean going cargo ships burn bunker oil, a fuel that is very dirty and particularly high in sulfur emissions. Locomotives burn a higher grade of diesel fuel that causes much less pollution. Believe it or not, even the dirtiest locomotive is a "spring breeze" compared to what comes out of most container ship smokestacks.
My own belief is that pollution is contributing to global warming, but it isn't the cause of global warming. We know that the earth goes through natural periods of warming and cooling, caused by the any number of factors--volcanoes, forest fires or meteor strikes, for example. But if we add a man-made contribution of carbon or sulfur pollution to the natural cycle of warming and cooling, we'll be amplifying the effect of Mother Nature's natural cycles. So if sunspots might be causing a 1 degree rise in the earth's temperature, that increase might become a 1.5 rise in the temperature due to man-made pollution contributions. Do we know what the effect of that extra warming will be, especially if we are heading into a historically large--but "natural"--period of warming?
My own belief is that pollution is contributing to global warming, but it isn't the cause of global warming. We know that the earth goes through natural periods of warming and cooling, caused by the any number of factors--volcanoes, forest fires or meteor strikes, for example. But if we add a man-made contribution of carbon or sulfur pollution to the natural cycle of warming and cooling, we'll be amplifying the effect of Mother Nature's natural cycles. So if sunspots might be causing a 1 degree rise in the earth's temperature, that increase might become a 1.5 rise in the temperature due to man-made pollution contributions. Do we know what the effect of that extra warming will be, especially if we are heading into a historically large--but "natural"--period of warming?