California buckwheat's delicate white and pink flowers belie an astonishing cleaning power, which scientists think could be harnessed to get rid of dangerous pollutants – and even recycle them. | AFP
California Buckwheat flowers bloom as part of the University of California Riverside Phyto Myco Remediation Study, using native plants and fungi to test sustainable soil clean-up solutions of sites known as brownfields that are contaminated with hazardous metals and chemicals, in a vacant lot in Los Angeles, California on May 19, 2023.
The plant’s delicate white and pink flowers belie an astonishing cleaning power, which scientists think could be harnessed to get rid of dangerous pollutants – and even recycle them.“That’s the miracle of life,” enthused 68-year-old Hampel, who is volunteering on the project. “The conventional method of cleaning up sites is just to dig up all the contaminated soil and to dump it somewhere else,” she told AFP.
“The reason is, it’s basically the same thing. A lot of our fossil fuels are just dead stuff that got compressed over long periods of time.” The responsibility to put them right falls on poorly funded or ill-equipped local authorities, who struggle to find the money or the expertise. In the United States, where the Environmental Protection Agency lists nearly 1,900 problem sites, only a small number of clean-up projects are carried out each year, Stevenson said.Advocates say bioremediation’s uses are not limited to fixing former industrial sites. The process can also be used to help clean up the toxic ash left by some wildfires – an annual problem in fire-prone California.
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