These techniques are thought to pose a risk of upsetting earth's natural rhythms.
Maids' mops and sponges were thought to pose the greatest threat as they could cause cross-contamination between rooms.
Dutch police last week announced that eagles would be used to bring down drones whenever the machines were thought to pose a danger to the public.
In the early 20th century, it was recognized that black currants served as an intermediate host of blister rust and were thought to pose a serious threat to white pines.
The United Nations forces, however, are allowed to shoot dogs sniffing hacked-up corpses outside the school's gates, because the animals are thought to pose a health threat.
This synthetic DNA is commonly used in laboratory science and is thought to pose no significant risks to other animals, but it kills mosquito larvae.
Hulu and other video-streaming websites, which are becoming more popular, give a great deal of control to consumers and are thought to pose a threat to advertising-supported television.
Or people.Most of those interested in xenotransplantation are considering pigs, rather than baboons or chimpanzees, because pigs are easier and cheaper to rear, and because harvesting pigs for organs is thought to pose fewer ethical difficulties.
At Seven Counties, some of the roughly 3,000 patients who were on Xanax have been switched to clonazepam, a longer-acting benzodiazepine that does not kick in as quickly and is thought to pose less risk of addiction.
South Korea and the United States last weekend said they had reached a deal to restrict trade in American to cattle under 30 months old and forbid exports of parts that are thought to pose a higher risk of mad cow disease.
