Increase in food production was partly spurred through intensive agriculture which resulted in the destruction of the traditional methods of conserving the productivity of the soil. Monocropping, along with overgrazing and cropping on marginal and hilly areas, resulted in ecological destruction due to decline in the productivity of the soil. Access to different species which are procured as food, has also resulted in the decline in biodiversity. Inextricably tied to this issue is that of meat production which includes modern practices of animal raising which has been directly responsible for air and water pollution as well as accentuated levels of carbon-dioxide emissions.