Global warming isn't the only another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year to humans. The falling another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year of insects is also another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year . Half of all insects another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year have been dying since the 1970s. Over 40 per cent of insect another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year could die in our another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year . The number of insects is decreasing by 2.5 per cent a another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year . It is an "insect apocalypse". Many another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year of butterflies, bees and other bugs are now another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year . Scientists say this could cause, "a another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year collapse of Earth's ecosystems". Pesticides used on another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year and gardens are killing another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year . Fewer insects mean we have another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year food. Three quarters of our crops depend on insects. We can't feed 7.5 another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year people without insects. A big another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year is the decline of honeybees. In the USA, the another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year of honeybee groups dropped from six million in 1947 to 2.5 million in 2014. A another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year warned that: "We can't wait another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year 25 years before we do another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year because it will be too another anything billion catastrophic danger dangerous extinct farms insects late less lifetime number numbers professor species worldwide worry year ."