when were landfills invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when were landfills invented	1.2	0.8	432	30	28
when	0.79	0.3	5492	40	4
were	1.56	0.5	3547	65	4
landfills	0.66	0.3	9817	58	9
invented	1.59	0.8	7353	58	8

Keyword	CPC	PCC	Volume	Score
when were landfills invented	1.62	1	1492	5
when was the first landfill	1.69	0.7	7536	32
history of landfills in america	1.54	0.9	8940	19
how did landfill start	1.87	0.6	6564	35
how long have landfills been around	0.68	0.2	7800	99
when did landfills become popular	0.22	1	1264	45
history of landfill sites	0.01	0.7	8990	26
history of landfill engineering	0.77	0.8	8047	76
history of landfill management	0.24	0.7	513	6
history of landfill gas	0.4	0.8	2775	43
history of landfill regulations	1.44	0.6	769	85
history of landfill mining	0.96	0.1	2506	18
history of landfill diversion	1.1	0.3	8572	82
history of landfill tax	1	0.7	8197	33
when did municipal landfills open	1.8	0.2	111	53
at the beginning of 2010 a landfill	1.67	1	5348	73
modern landfills are designed with	1.47	0.9	4078	59
history of landfill leachate	0.12	0.7	8404	26
why do landfills exist	1.54	0.6	4143	37
how landfills are made	0.53	1	7949	42
historic landfill sites uk	1.47	0.4	4588	9