Table 4. Eigenvalues and variance ratios of metals in foliar dusts of Panzhihua.

Principal component	Initial eigenvalues			Extracted eigenvalues			Rotated eigenvalues
	Eigenvalues	% of variance explained	% of cumulative	Eigenvalues	% of variance explained	% of cumulative	Eigenvalues	% of variance explained	% of cumulative
1	4.33	48.07	48.07	4.33	48.07	48.07	3.66	40.65	40.65
2	2.26	25.07	73.14	2.26	25.07	73.14	2.31	25.63	66.27
3	1.24	13.74	86.88	1.24	13.74	86.88	1.53	17.00	83.27
4	0.81	9.05	95.92	0.81	9.05	95.92	1.14	12.65	95.92
5	0.26	2.91	98.83
6	0.06	0.68	99.51
7	0.03	0.32	99.83
8	0.01	0.09	99.93
9	0.01	0.07	100.00