科普英语辩论陈词.docx

Bees and NeonicsThe advantages of Neonics: First, they can be used on a vast majority of plants, including 95% percent of corn and the canola crops, fruits and vegetable crops. Second, they are effective against many insects, including the sucking insects, some chewing insects, soil insects and are also used to control fleas on domestic animals.Third, most neonics are water-soluble and break down slowly in the environment, so they can be taken up bythe plant and provide protection from insects as the plant grows.The consequences of using neonics:It was pointed out by plenty of studies that the wide use of neonics has caused a great deal of bees’ deaths. It is believed that the residues of neonics on the plants have impacted bees’ ability to forage, learn and remember navigation routes to and from food sources.As a result, a phenomenon called Colony Collapse Disorder appeared, and this has lead to a massive loss of bees. Furthermore, more plants are supposed to die because the lack of pollinators. In addition, it would impact our human beings. As a matter of fact, among the 1300 species of plants which are useful to humans, 1100 species require pollination by the bees. So if we use the neonics, we will not only cause terrible ecological problems, but also cause disastrous economic loss.BiodiversityExtinctions are bad, we have the responsibility to protect biodiversity:Biodiversity is important to ecological stability, and this will be threatened by excessive species extinctions. Every species is closely related to other species. This is to say, if one species becomes extinct, others will be affected. For example, frogs will find difficulties in finding food if the flies become extinct. And step by step, if a large amount of species become extinct, finally we human beings will be affected. We feed on and rely on other species. It would be impossible for us to survive on the earth without them. So we have the responsibility to protect the biodiversity, not only for the