It is already known that dogs can use their​【小题1】 (high) developed sense of smell to search out drugs,explosives and disaster【小题2】 (survive). Also, dogs have been trained to find a different kind of threat 【小题3】 the past few weeks: some plant species that can harm the environment. New York officials have identified​【小题4】 ​invasive plant species【小题5】 (start) to spread in several​ 【小题6】 the state's major parks. The plant is a yellow-flowered bush called Scotch broom. Scotch broom is widespread in areas of America's Pacific Northwest. But it is still fairly new​【小题7】 New York. Officials are seeking to stop the plant's growth​【小题8】 ​it becomes widespread. After the dogs identify the species, people then attempt to remove them before they become a wide problem.Dogs are especially effective at this work because they can smell the plants hidden【小题9】 other species. A study found that trained dogs can smell and find twice more invasive plants​ 【小题10】 humans can observe with their eyes.

There’s good news for endangered species in the Congo Basin. A new study shows a higher number of large mammals (哺乳动物) in the forests registered by the Forest Stewardship Council (FSC) in Gabon and the Republic of Congo, 【小题1】 (compare) to non-FSC-registered forests. This news highlights the importance of FSC-registered forest concessions, areas where logging (伐木) is managed, in the 【小题2】 (protect) of wildlife.

By【小题3】 (careful) documenting individual animal counts and strategically positioning camera traps, the research confirmed that registered concessions notably house a much 【小题4】 (big) population of large mammals — 2.7 times more for mammals over 220 pounds, such as gorillas and forest elephants. The protection of these large mammals makes a positive impact 【小题5】 the area.

The new study is the first to compare so many different forest areas at the same time, 【小题6】 (use) 474 camera traps across 14 logging concessions. The results fit previous research that 【小题7】 (conduct) in the Peruvian Amazon years ago, which found that it is possible 【小题8】 (have) production forestry coexist with biodiversity conservation (保护) if done in the right way and in the right places.

“We put much time and effort into the large project that took five years and involved hundreds of local people,” said Utrecht University’s Joeri Zwerts, 【小题9】 led the Congo Basin study. “It was hard work, 【小题10】 the knowledge we got will make an important contribution to the protection of animals in these forests.

On a 【小题1】 (freeze) cold day in January 1994, Jiesang Suonandajie gave his life to save the Tibetan antelope. By the 1990s, the number of the antelopes 【小题2】 (fall) from millions to about 50, 000. The reason is 【小题3】 the wool of the Tibetan antelope is the 【小题4】 (expensive) in the world and brings huge profits to poachers. Often at night, whole herds of antelopes are shot and skinned 【小题5】 the spot with the 【小题6】 (except) of the babies. Then the wool is taken to India to make shawls, which 【小题7】 (export) to rich countries in North America and Europe. In the 1990s, the Chinese government began to protect the antelopes 【小题8】 (active). Meanwhile, in those countries【小题9】 the shawls are sold, the police are getting tough with the dealers, making the antelope population increase 【小题10】 (slow) since 1997.