While the mainstream is linking biodiversity decline to climate change, one does not need to go there, since the business-as-usual system supplies enough destructive force to take down entire species. We need only think of colony collapse disorder, for the bee population, thought to be the effects of pesticides and other agricultural chemicals. The loss of habitat through urbanisation, fuelled by mass migration, is another factor. The loss of animal diversity is having a kick on effect upon ecosystems, as less animals also impacts upon plants requiring animal pollinators, and so plants fail to reproduce.