Positive aspects. Ecosystem services. The use of insects in science. Use of insects in medicine and cosmetic industry. Use of insects in technology (insect bionics). Commercial use of insects. Food use of insects. Use of insects in agriculture and forestry. Insects as a form of entertainment. Other Uses of Insects. Business related to insects. Insects in culture. Insect conservation. Negative aspects. Insects as pests. Insects as a vector of plant diseases. Insects as a vector of diseases in animals and humans. Bloodsucking insects and ticks. Venomous insects and arachnids. Invasions of insects. Insect allergy. Conclusion. Appendixes.