Keyword Analysis & Research: why was the clean air act amended in 1990

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why was the clean air act amended in 1990	0.11	0.9	7732	20	41
why	1.36	0.6	5456	8	3
was	1.76	1	5821	71	3
the	1.27	0.8	5443	32	3
clean	0.54	0.7	6602	61	5
air	0.27	0.7	1023	75	3
act	0.18	0.3	1851	33	3
amended	0.23	0.4	9775	18	7
in	0.69	0.1	8569	33	2
1990	0.6	0.5	841	99	4

Keyword	CPC	PCC	Volume	Score
why was the clean air act amended in 1990	0.59	0.1	1343	10