Rather than keeping immigrants out, China's new tree wall is designed to keep out the smog-producing sand and dirt that blows south into Beijing from the Gobi Desert.
To combat pollution's health hazard and fossil-fuel causing climate change, China is employing a 3-pronged plan: 1) manufacturing electric cars and banning gas-fueled vehicles, 2) constructing towers to filter dirty air, and 3) planting a wall of pine and poplar trees.
Trees are the focus here, because electric cars powered by lithium batteries and air-filtering towers were the subjects of the earlier post, "How to Meet the Clean Air Challenge."
Like the Sahara in Africa that even blows sand into Europe, the Gobi Desert expands into China, covering as much as 1,000 more square miles annually. Besides causing pollution, sand eliminates farming and livestock grazing land and closes roads and rail lines. By adding to the demand on groundwater and the loss of trees for firewood, population growth in Inner Mongolia, directly south of the Gobi Desert, also strips Beijing of any protection from wind blown sand. In both Africa and China, before close analysis, planting trees seems like a good solution to stabilize topsoil, absorb greenhouse gases, and even increase rainfall.
According to an article in Mother Jones (August, 2017), Beijing's forestation efforts began in 1978 and accelerated as a government priority after 2000. Since then, up to 700,000 villagers have been forced off their family plats to make way for trees. By 2018, the government set ambitious planting targets: 32,400 new square miles worth of trees by the end of the year and an increase in the forested area of China's landmass from 21% to 23% by 2020 and to 26% by 2035. Villagers are paid to plant seedlings, and in 2018 armed police and 60,000 soldiers from the People's Liberation Army were reassigned from duty on the northern border in order to plant trees in Hebei Province around Beijing and the area where China will host the Winter Olympics in 2022.
In response to the government's commitment to battle sand, the State Forestry Administration gained an incentive to claim the frequency of sandstorms decreased 20% between 2009 and 2014, rainfall increased almost six fold in 29 years, and a high percentage (60% to 75%) of new trees survived three years. By planting trees, running solar power fields, and attracting ecotourists, contractors, such as Wang Wenbiao, who heads the $6 billion Elion Resources Group, are making fortunes implementing these government programs. Wang also owns the Seven Star Lakes Desert Hotel and golf course which has a fountain at the entrance and a green lawn and grove of poplars.
Trees in the fast growing poplar genus include aspen trees that require an extensive root system to acquire the large amount of water desert conditions do not provide. Pictures of what are said to be poplars do not look as though they are growing the 3' to 5' annually that is expected.
The smog reduction potential of China's electric cars, and maybe air filtering towers, seems to offer more promise than forestation.
Showing posts with label smog. Show all posts
Showing posts with label smog. Show all posts
Saturday, February 24, 2018
Sunday, January 21, 2018
How to Meet the Clean Air Challenge
Similar to the process of producing clean water, one method China uses to attempt to reduce chronic smog pollution moves dirty air through a filtration system.
In Beijing, a Dutch invention cleans air using a 23-foot, cylindrical filtration tower powered by electricity from a coal-fired power plant. A 300-foot tower surrounded by coated greenhouses in Xian, Shaanxi province, is experimenting with a more complex process. In daylight hours, solar radiation heats polluted air in the greenhouses before it rises in the tower through a series of purifying filters and is released into a 3.86 square mile area. Thus far, the Xian tower, when treating severely polluted air, especially in winter when coal provides heat in the area, shows only a 15% reduction in the fine small particles most hazardous to health. Yet, Xian's developers have an ambitious plan to construct 1,640-foot anti-pollution towers, each surrounded by 11.6 square miles of greenhouses, in other Chinese cities.
Based on the Australian study mentioned in the earlier post, "Priority: Eliminate generating electricity from fossil fuels," coal-fueled power plants are the major source of pollution. These air filtration towers would seem to do the most good, if they were located in the vicinity of power plants.
Startups and traditional automakers throughout the world race to produce the electric cars that promise to eliminate a source of pollution, the fossil fuels that power today's cars and trucks. The challenge to up the percentage of electric passenger cars from less than 1% on the world's roads today to at least 33% by 2040 involves financing, designing, engineering, manufacturing, charging stations, searching for the lithium used in batteries, and marketing. China is the industry's acknowledged leader with Tesla in the U.S. and European automakers also in the hunt.
Although China is expected to continue to import lithium from South America's Argentina-Chile-Bolivia Belt (See the earlier post, "Technology's Hard Sell and the Public's Role in the Lithium-ion Battery Industry."), it has its own domestic supply. In the cold, thin air high in China's mountains between the Tibet Autonomous Region and the Xinjiang Uighur Autonomous Region, mining in Chaerhan Salt Lake is on track to supply a plant that will produce 30,000 tons of lithium carbonate by 2020 or 2021 and eventually plants that produce 200,000 tons annually.
China also has ideas for creating charging methods to keep electric cars on the road away from home. When driving long distances, drivers could visit automated swap stations to switch their dying batteries for new ones in three minutes, or they could call mobile vans to come and recharge their dying batteries in ten minutes. (I cannot help but recall the toxic nano particles a high school student found, when her summer intern project at the University of Wisconsin studied the effects of decomposing lithium batteries. See the earlier post, "The Challenge of New Technologies: Prepare to Think.") By requiring foreign auto dealers to sell only electric cars and to provide charging options, China is in a position to restrict entry into the world's biggest market.
In Beijing, a Dutch invention cleans air using a 23-foot, cylindrical filtration tower powered by electricity from a coal-fired power plant. A 300-foot tower surrounded by coated greenhouses in Xian, Shaanxi province, is experimenting with a more complex process. In daylight hours, solar radiation heats polluted air in the greenhouses before it rises in the tower through a series of purifying filters and is released into a 3.86 square mile area. Thus far, the Xian tower, when treating severely polluted air, especially in winter when coal provides heat in the area, shows only a 15% reduction in the fine small particles most hazardous to health. Yet, Xian's developers have an ambitious plan to construct 1,640-foot anti-pollution towers, each surrounded by 11.6 square miles of greenhouses, in other Chinese cities.
Based on the Australian study mentioned in the earlier post, "Priority: Eliminate generating electricity from fossil fuels," coal-fueled power plants are the major source of pollution. These air filtration towers would seem to do the most good, if they were located in the vicinity of power plants.
Startups and traditional automakers throughout the world race to produce the electric cars that promise to eliminate a source of pollution, the fossil fuels that power today's cars and trucks. The challenge to up the percentage of electric passenger cars from less than 1% on the world's roads today to at least 33% by 2040 involves financing, designing, engineering, manufacturing, charging stations, searching for the lithium used in batteries, and marketing. China is the industry's acknowledged leader with Tesla in the U.S. and European automakers also in the hunt.
Although China is expected to continue to import lithium from South America's Argentina-Chile-Bolivia Belt (See the earlier post, "Technology's Hard Sell and the Public's Role in the Lithium-ion Battery Industry."), it has its own domestic supply. In the cold, thin air high in China's mountains between the Tibet Autonomous Region and the Xinjiang Uighur Autonomous Region, mining in Chaerhan Salt Lake is on track to supply a plant that will produce 30,000 tons of lithium carbonate by 2020 or 2021 and eventually plants that produce 200,000 tons annually.
China also has ideas for creating charging methods to keep electric cars on the road away from home. When driving long distances, drivers could visit automated swap stations to switch their dying batteries for new ones in three minutes, or they could call mobile vans to come and recharge their dying batteries in ten minutes. (I cannot help but recall the toxic nano particles a high school student found, when her summer intern project at the University of Wisconsin studied the effects of decomposing lithium batteries. See the earlier post, "The Challenge of New Technologies: Prepare to Think.") By requiring foreign auto dealers to sell only electric cars and to provide charging options, China is in a position to restrict entry into the world's biggest market.
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