Read the extract before you start to answer. Between 1960 and 2019 there was a ten-fold increase in the use of fertiliser by farmers to increase agricultural output. Over the same period crop production increased four-fold. Fertiliser is produced by applying acids to phosphate rock. Phosphate rock is a finite resource and the amount available is decreasing. In addition, the production of fertiliser requires the substantial use of non-renewable resources such as gas and coal. This results in greenhouse gas emissions. Consequently, fertiliser production is responsible for 1% of total global energy use and 1.4% of total carbon emissions. The fertilisers that are used on farmland are often washed into rivers and lakes. This causes algae to develop and oxygen levels to decrease, resulting in a decline in fish stocks. 85% of the world's supply of phosphate rock comes from just five countries. Morocco produces 70% of total production. France and Germany are the largest fertiliser manufacturers in the European Union. The European Union's tradeable pollution permit scheme applies to fertiliser manufacturers in these countries. With reference to the Extract, discuss the external costs associated with the production and the use of fertiliser. Illustrate your answer with an appropriate diagram(Diagram only not enough for 14 mark)
