1 . The huge billboard at the side of the highway is no joke; transporting firewood in certain areas is a crime, punishable by a four-thousand-dollar fine. The reason? Emerald Ash Borer disease, or EAB disease, a new addition to the long list of dangerous foreign pest infestations（虫害）on American soil. It was in 2002 when the Emerald Ash Borer beetle（甲虫）was first discovered in Michigan. Not long after, the pest was found in Ohio. Originally from Asia, this green beetle probably found its way to North America through a wooden box made of ash wood and immediately settled into a local ash tree. In little time, the species managed to kill millions of ash trees.
To date, much work is underway to stop ash trees ending up in the same group as elm and chestnut trees, which are all dying out in many areas. Ash Borer Infestations are particularly troublesome because they are difficult to identify until the ash tree is heavily infested. In addition, other ash trees in the area surrounding the source will probably also be infested, making control a hard task.
Researchers are working on many issues related to the control and removal of this harmful beetle. For example, it has been discovered that Asian ash trees are not destroyed by this native borer. It may be that, Asian ash trees have developed genes（基因）to protect them from the insect; therein, perhaps, lies the secret to controlling this pest. Insecticide（杀虫剂）treatment is also being explored on several fronts. Research is underway to determine which insecticides are proving to be the most successful. The proper application of the insecticides is being debated.
However, all possible solutions require a great deal of study and research. In the meantime, careful steps must be taken. Methodical identification of infested trees is taking place. Identified trees are being cut down and destroyed to get rid of the beetle colonies（群）. In the end, this puts a huge drain（消耗）on city budgets, as tree removal can be extremely expensive.
Even though it will be expensive to deal with this problem in the short term, the costs of doing nothing could be far higher, since we could lose an entire species of tree.
1. What can we learn about the Emerald Ash Borer beetle?| A．It is a newly found species. |
| B．It can be used to fight foreign pest infestations. |
| C．It is native to North America. |
| D．It can cause damaging harm to American ash trees. |
| A．They affect Asian ash trees most frequently. |
| B．They are difficult to identify and get rid of. |
| C．They break out at certain times every year. |
| D．They spread slowly in a small area. |
| A．Gene activation. | B．Insecticide use. |
| C．Removing infested trees. | D．Introducing the beetle’s enemies. |
| A．Healthy trees should be relocated and protected. |
| B．Protecting the ash tree should be done at any cost. |
| C．Government budget for tree removal should be cut. |
| D．Measures that have side effects should be avoided. |
2 . Britain’s seed bank the only one in the world aiming to collect all of the planet’s wild plant species, has reached its goal of banking 10 percent by 2010.
The Millennium Seed Bank Project run by Kew Gardens — one of the oldest botanical gardens — will officially deposit the 24,200th species on Thursday, a pink, wild banana from China.
More than 50 countries are now on board with Kew’s giant task but vast places of the globe, including India and Brazil, still need to join in and donate seeds, director Paul Smith said.
The seed bank is one of the largest and most diverse in the world with more than 1.5 billion seeds. Its goal is to help protect the planet’s bio-diversity during a time of climate change.
The wild banana seed is under threat of extinction (灭绝) in southwest China from agricultural development. It is a vital food source for Asia elephants and important for growing bananas for human consumption.
The seeds are stored at minus 20 degrees centigrade. So they can last for thousands of years, the seeds await the day that scientists hope never comes — when the species no longer exist in the wild.
It is a race against time, Smith said, because in the last decade alone, 20 plants held in the bank have already been wiped out in the wild. He estimates that between a third and a quarter will become extinct this century.
“It is urgent and it is happening now. An area, the size of England, is cleared of primary vegetation (植被) every year.” Smith said.
Because most of the world’s food and medicines come from nature, protecting wild plant species is quite important, scientists say. There are already many other seed banks safeguarding food crops, which only account for 0.6 percent of plant diversity.
For Kew’s next goal — to collect a quarter of wild varieties by 2020 — the botanists need 10 million pounds a year, or a further 100 million pounds on top of the 40 million they have already been granted.
1. What’s the final purpose of the Britain’s seed bank?| A．To collect enough money for the project. |
| B．To safeguard food crops. |
| C．To help scientists study wild plants. |
| D．To protect wild plants from extinction. |
| A．the climate change in this area | B．the expanding of farming work |
| C．the large number of Asian elephants | D．human’s large consumption |
| A．the seeds in the bank can be used now and then all over the world |
| B．there is only one seed bank in the world at present |
| C．India and Brazil haven’t joined in the Seed Bank Project at present |
| D．the wild plants in places like India and China will never die out |
| A．The extinction of plant species. | B．Kew Gardens’ next goal. |
| C．The Millennium Seed Bank Project. | D．Britain’s seed bank. |
| A．The global partnership of collecting wild plant species. |
| B．The temperature condition of the conservative wild plant species. |
| C．Scientists’ concern on the extinct wild plant species. |
| D．The government’s financial support for the seed bank project. |
