linking words

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Hello, are there any linking words  I can use in the paragraph? Thank you                                                                                                                                                                                              Biological hazards can make food harmful to human health by transmitting infection or causing food poisoning. Actually infection arises from consumption of food containing pathogenic bacteria or spores, which colonise the intestine, producing toxins which make us ill. Moreover, bacteria can grow thanks to the presence of oxygen in food and they develop in meat, fish, eggs and dairy products. In addition Room temperature also facilitates bacterial growth and reproduction, while high temperatures kill