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As wildfires increase the smoke they produce increases even more greatly (St. Albert Gazette). A Canadian professor “said his research suggests Alberta would likely see the amount of land it loses to forest fires each year double by 2100 due to current climate trends. Those fires will burn wider and deeper into the forest floor, which means more smoke – six to 12 times more, he predicted.” The smoke damage from fires creates health problems in far-distant places, which have already become a serious matter.
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This year is far above normal for wildfires on the Alaskan tundra (Reuters). Tundra fires, which are sparked by lightning, burn the low-lying plants that live in the active layer of earth that remains when permafrost at the surface thaws down in the spring. This year’s thawing came early and the plant matter is dry. In 2007 some fires burned for months, releasing a great amount of carbon to the atmosphere and doing lasting damage to the permafrost.
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A new study describes the way ozone depletion has a significant effect on the climate of the Southern Hemisphere (Phys.org). “While ozone depletion has long been known to increase harmful UV radiation at the Earth’s surface, its effect on climate has only recently become evident…..Ozone is a greenhouse gas, so the ozone hole has kept Antarctica cooler, pulling the westerly wind jet that circles the continent closer and tighter to Antarctica. This has increased the speed of the wind, making Antarctica cooler and drier, pulling other Southern Hemisphere weather zones further south.” Many of the broad-based effects from this cause are described
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Climate change increases the global demand for energy (Phys.org). A new study has calculated the actual amount that will be required, which, as expected, is mainly due to satisfying the need for more cooling. On top of population and income growth, “the findings indicate that climate change increases the global demand for energy around 2050 by 11 to 27 percent with modest warming, and 25 to 58 percent with vigorous warming.” This adds more to the reasons for hurrying renewable energy replacement.
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Cement produces more pollution than all the trucks in the world (Bloomberg). This is a fine overview of the cement emissions problem, and why it is so hard to overcome. “There are cement products with lower environmental impact, but they usually cost more than the normal ones…..greener forms of cement can cost triple what the traditional mix does.” Buyers are sensitive to price, regulation is ineffective and substitutes that carry hope are not well tested, making for a big dilemma.
https://www.bloomberg.com/news/articles/2019-06-23/green-cement-struggles-to-expand-market-as-pollution-focus-grows
https://www.bloomberg.com/news/articles/2019-06-23/green-cement-struggles-to-expand-market-as-pollution-focus-grows
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A chronology of how humanity has dealt with climate change from 1824 through February of this year. The author is a professor at the University of Maine who teaches a course in climate policy. From the introduction, “The most challenging of all endeavors in human history will likely be that of understanding the impact of our industrial and technological enterprises on the planet’s climate and ecosystems, and responding effectively to the threats posed by that impact.” Material from the early years is something everyone should know about.
Carl