Agricultural Outputs Versus Input Requirements

Even a cursory glance at the online encyclopaedia, Wikipedia, reveals that the environmental impact of agriculture is of global significance.

Article 1: Agriculture, Environmental Impact

Agriculture imposes external costs upon society through pesticides, nutrient run-off, excessive water usage, and assorted other problems.

Water Usage

Agriculture accounts for 70 per cent of withdrawals from freshwater resources. However, increasing pressure being placed on water resources by industry, cities and the involving biofuels industry, means that water scarcity is increasing and agriculture is facing the challenge of producing more food for the world's growing population with fewer water resources.