When the Iron Curtain fell 15 years ago, the free world's scientists got their first good look at the environmental consequences of East Europe's communist economy.
Scientists worldwide have since been studying the region's polluted sites and helping post-communist governments launch massive cleanups of old Soviet military bases, Czech uranium mines and Slovakian chemical plants.
Now, the same scientists are turning their attention to a new and apparently larger environmental challenge -- China.
A window to China's problems with land and water contamination is slowly opening to the rest of the world's environmental experts. As a result European scientists, including some from former communist countries, are getting involved.
Czech plant biotechnology specialist Tomas Vanek, who was recently invited by Beijing authorities to work on soil contamination issues, says: "Now China is starting to cooperate."
An international conference in Nanjing last autumn reflected what appears to be China's growing willingness to accept foreign expertise.
British, Dutch and Czech scientists were among those welcomed to the Soil Pollution and Remediation Conference, sponsored by the Chinese Academy of Sciences and other government agencies.
They focused on ways to remedy environmental problems created by China's ongoing rush to industrialize, modernize farms and expand cities.
Vanek presented a paper on the use of flax and hemp crops to remediate land contaminated by low-level radioactivity.
According to his five-year study, flax can be safely grown in radioactive soil and then harvested for industrial purposes, such as fibres and non-edible oils. Both crops also prevent erosion and provide revenue to offset the costs of managing waste sites.
Similar studies on so-called "phytoremediation" techniques are being conducted around the world.
Swedish scientists are now testing Vanek's idea to grow hemp on polluted land and process the harvested crop for auto insulation, rope or as an energy source.
Vanek said Chinese officials "are very interested" in phytoremediation as a low-cost solution to land pollution.
How much land in the world's largest country will require an environmental cleanup?
"No one really knows," Vanek says. "This data is partially confidential."
Papers presented by Chinese scientists at the conference confirmed Vanek's point. One by four experts from the science academy and a Nanjing university said the amount of soil pollution nationwide is "unclear."
The Chinese experts cited a 1999 Beijing government report which said "various contaminants" had polluted 20 percent of the nation's cropland, while "another report indicated that about 20 million hectares of the cropland was contaminated with heavy metals and about 60 million hectares of cropland was polluted with pesticides and other chemicals."
Other Chinese scientists at the gathering emphasized a need for more basic research, environmental standards and government regulations to clean up polluted land as well as prevent contamination.
A key impetus for giving the environment more attention, the scientists said, was foreign investment.
Multinational companies that have expanded, or may expand, into China often carry their own land use standards which, for example, prevent them from building factories on heavily polluted ground.
One study at the conference described the complicated process of testing and then remediating polluted groundwater at a site in northern China where a company wanted to build an auto factory. The water had been contaminated by chemicals leaking from a former lumber yard.
European scientists like Vanek are offering their Chinese colleagues research findings as well as important information based on personal experience.
One study presented by Swiss and Bulgarian scientists, for example, examined problems near Sofia where farmland was contaminated by metals from industrial smelters. Similarly a British study looked at using plants to clean up sites tainted by explosives.
Vanek says recent Czech experience with cleaning up old uranium mines, which supplied material for Soviet warheads and nuclear plants, helped underscore the advantages of flax as a money-making cover crop in radioactive areas.
Now Vanek is working through e-mails with Chinese scientists who face similar issues and, finally, are allowed to talk about it openly with experts around the world.
The gutting of Voice of America (VOA) and Radio Free Asia (RFA) by US President Donald Trump’s administration poses a serious threat to the global voice of freedom, particularly for those living under authoritarian regimes such as China. The US — hailed as the model of liberal democracy — has the moral responsibility to uphold the values it champions. In undermining these institutions, the US risks diminishing its “soft power,” a pivotal pillar of its global influence. VOA Tibetan and RFA Tibetan played an enormous role in promoting the strong image of the US in and outside Tibet. On VOA Tibetan,
There is much evidence that the Chinese Communist Party (CCP) is sending soldiers from the People’s Liberation Army (PLA) to support Russia’s invasion of Ukraine — and is learning lessons for a future war against Taiwan. Until now, the CCP has claimed that they have not sent PLA personnel to support Russian aggression. On 18 April, Ukrainian President Volodymyr Zelinskiy announced that the CCP is supplying war supplies such as gunpowder, artillery, and weapons subcomponents to Russia. When Zelinskiy announced on 9 April that the Ukrainian Army had captured two Chinese nationals fighting with Russians on the front line with details
On a quiet lane in Taipei’s central Daan District (大安), an otherwise unremarkable high-rise is marked by a police guard and a tawdry A4 printout from the Ministry of Foreign Affairs indicating an “embassy area.” Keen observers would see the emblem of the Holy See, one of Taiwan’s 12 so-called “diplomatic allies.” Unlike Taipei’s other embassies and quasi-consulates, no national flag flies there, nor is there a plaque indicating what country’s embassy this is. Visitors hoping to sign a condolence book for the late Pope Francis would instead have to visit the Italian Trade Office, adjacent to Taipei 101. The death of
By now, most of Taiwan has heard Taipei Mayor Chiang Wan-an’s (蔣萬安) threats to initiate a vote of no confidence against the Cabinet. His rationale is that the Democratic Progressive Party (DPP)-led government’s investigation into alleged signature forgery in the Chinese Nationalist Party’s (KMT) recall campaign constitutes “political persecution.” I sincerely hope he goes through with it. The opposition currently holds a majority in the Legislative Yuan, so the initiation of a no-confidence motion and its passage should be entirely within reach. If Chiang truly believes that the government is overreaching, abusing its power and targeting political opponents — then
RSS