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The number aboutbyforfrominofonwith insects aboutbyforfrominofonwith the world has fallen aboutbyforfrominofonwith 45 per cent in the past 35 years. Scientists say this could be dangerous aboutbyforfrominofonwith humans. A report aboutbyforfrominofonwith insect numbers has been published in the journal 'Science'. It says the human population has doubled since 1980 while the number aboutbyforfrominofonwith insects has nearly halved. One of the biggest reasons for this loss of insects is deforestation. Many aboutbyforfrominofonwith the places where insects live are disappearing because aboutbyforfrominofonwith new cities and land being used for farming. Another reason is global warming. Scientists say that aboutbyforfrominofonwith the UK, the number of beetles, butterflies, bees and wasps has fallen by up to 60 per cent. Many countries are worried aboutbyforfrominofonwith the disappearance of bees and butterflies.

Scientists say the decline aboutbyforfrominofonwith insect populations will lead to many problems aboutbyforfrominofonwith humans. One of the biggest dangers is that there will be fewer insects to pollinate flowers. This means that farmers will have problems growing food. The lead author aboutbyforfrominofonwith the report, professor Rodolfo Dirzo, said falling numbers aboutbyforfrominofonwith insects could also lead to more disease aboutbyforfrominofonwith humans. He said rats and mice would have less food to eat so they will move to cities and bring diseases aboutbyforfrominofonwith them. Dr Ben Collen aboutbyforfrominofonwith London University said we needed to stop more insects aboutbyforfrominofonwith dying. He added that scientists must understand, "what species are winning and losing aboutbyforfrominofonwith the fight aboutbyforfrominofonwith survival". He said this knowledge would help us to protect the "helpful" insects.