Supply-side drivers of phosphorus emissions from phosphorus supply chains in China

Figures & data

Table 1. Framework of the supply table.

		Products			Total
		Phosphate rocks	…	Waste disposal Services
Industry	Mining	V			g
	…
	Solid waste disposal
Total supply		x^T

Table footnotes: V = Make matrix – transpose of Supply matrix (industry by product); V^T = Supply matrix (product by industry); x = Row vector of product output; x^T = Row vector of product input; g = Column vector of industry output; g^T = Row vector of industry output.

Table 2. Framework of the use table.

		Industry			Final use		Environment				Total outputs
		Mining	…	Solid waste disposal	Net exports	Change in stock	Atmosphere	Land	Inland water	Marine water
Products	Phosphate rocks	U			Y		EI				x
	…
	Waste disposal Services
Natural inputs	Atmosphere	W									w
	Land
	Inland water
	Marine water
Total inputs		g^T			y

Table footnotes: U = Use matrix for intermediates (product by industry); Y = Final use matrix (product by category); E_I = Satellite account matrix (components by product); W = Natural input matrix (components by industry); w = Column vector of natural input; y = Row vector of final use.

Table 3. Framework of the physical input-output table.

		Products			Final use			Environment				Total outputs
		Phosphate rocks	…	Waste disposal Services	Net exports	Change in stock	Household consumption	Atmosphere	Land	Inland water	Marine water
Products	Phosphate rocks	Sd			Y			EI				x
	…
	Waste disposal Services
Natural inputs	Atmosphere	E										w
	Land
	Inland water
	Marine water
Total inputs		x^T

Table footnotes: S_d = Matrix for intermediates (Product by Product); E = Gross natural input matrix (components by homogenous branches).

 

Figure 1. China’s P emissions to the environment (including air, land, water, and sea) from the supply perspective during 1949–2012.

Figure 2. Production perspective and supply perspective P emissions of products in China in 2012. The percentages in the figure indicate P emissions from products as a percentage of total P emissions from the two perspectives.

Figure 3. Supply-side P emissions of the phosphate rocks during 1949–2012.

Figure 4. Comparison of the trends in supply-side P emissions of products in China during 1949–2012. The gray lines in the figure represent other products such as excreta from poultry, pigs and maize.

Figure 5. Relative contributions of socioeconomic factors to China’s P emission changes during different time periods from the supply perspective.

Figure 6. Relative contributions of socioeconomic factors to China’s P emission changes from the supply perspective during 1949–2012.