Assessing and promoting eco-policies in Toyota City, Japan

Figures & data

Table 1. Questionnaire items.

Survey questions
Q1. Do you know about next-generation cars?
Q2. Do you know about the heat island effect?
Q3. Do you know about Ecoful Town?
Q4. Do you know about smart houses?
Q5. Do you know about eco-points?

Table 2. Research participants’ residence, research year, age, and sex.

	n (%)	2012	2015	2018
Total		161	635	201
Citizens		124	422	137
Noncitizens		37	213	64
Age
	≤19	43	174	117
	20–29	20	152	25
	30–39	27	85	16
	40–49	20	85	6
	≥50	51	139	37
Sex
	Women	68	321	108
	Men	93	314	93

Table 3. Factors and environmental awareness.

Explanatory variable	NGCs OR (95% CI)	Ecoful Town OR (95% CI)	Heat island effect OR (95% CI)	Smart houses OR (95% CI)	Eco-points OR (95% CI)	Sum of “yes” IRR (95% CI)
Residence (Ref. noncitizens)
Citizens	0.92 (0.69–1.23)	2.58 (1.94–3.43)	0.98 (0.74–1.29)	1.15 (0.87–1.52)	1.51** (1.13–2.02)	1.15** (1.06–1.26)
Year (Ref. 2012)
2015	0.97 (0.68–1.39)	3.66** (2.50–5.37)	1.05 (0.74–1.48)	0.96 (0.68–1.35)	3.34** (2.32–4.81)	1.28** (1.14–1.44)
2018	8.37**(5.11–13.71)	2.99** (1.89–4.72)	3.02** (1.94–4.68)	0.45** (0.29–0.70)	0.87 (0.55–1.38)	1.38** (1.20–1.59)
Sex (Ref. women)
Men	1.31* (1.00–1.71)	1.03 (0.80–1.34)	1.25 (0.97–1.62)	1.19 (0.92–1.53)	1.23 (0.94–1.60)	1.08* (1.00-1.17)
Age (Ref. 10s)
20s	1.51* (1.01–2.25)	0.89 (0.61–1.30)	1.01 (0.70–1.48)	1.00 (0.69–1.45)	1.69** (1.16–2.48)	1.09 (0.96–1.23)
30s	2.45** (1.58–3.82)	1.43 (0.93–2.19)	1.98** (1.29–3.03)	1.96** (1.29–2.96)	2.78** (1.80–4.29)	1.42** (1.25–1.62)
40s	3.06** (1.92–4.86)	1.24 (0.78–1.95)	1.52 (0.97–2.36)	1.64* (1.06–2.54)	2.86** (1.79–4.56)	1.38** (1.20–1.59)
50 or over	2.14** (1.47–3.13)	1.77** (1.24–2.53)	1.92** (1.35–2.73)	1.48* (1.05–2.08)	3.56** (2.46–5.15)	1.42** (1.27–1.58)

CI: confidence interval; OR: odds ratio of logistic regression.

Sum of the number of “yes” in Poisson regression.

IRR: Incidence rate ratio of Poisson regression; *p < .05, **p < .01.