some science question in english 追加100分! 我出300人名币如果有人今天给我答案!!!

1. Why is there a world food crisis?
2. What is chlorpyrifos?
3. What are the advantages/disadvantages of using chlorpyrifos? (each has to have 3 answer and prove it)
4. How is the use of chlorpyrifos an economic issue?
5. How is the use of chlorpyrifos?
6. Is the use of chlorpyrifos a good or a bad idea?

我们科学在做这些..现在我们在写有关这个的作文..要求 1000个英文单词以上2500个以下.. 要bibliography.. 而且不能引用超过500个单词的copy！
我出300人名币如果有人今天给我答案!!!明天要教了!!!

i have some science questions.if u know english and science , just come and help me Jack had some model plane and Ted liked the subject science as Tim. Some language learners find _______ difficult to succeed in other fields of science. The failure induces at least some moedesty vis-a-vis one's own approach and theories of science QU是什么意思 qu丁庄村做几路车 Science questions` science homework science question!!!!!!!! science question