Table 1.

Post-hoc analysis results: statistical significance between environmental concern rankings per group [(A) lay respondents, (B) topic-experienced respondents] analysed with pairwise comparison Wilcoxon signed rank tests and Bonferroni correction.

	Air quality	Food source contamination	Plastic in general	Microplastics	Climate change	Increase in global population	Drought
A
Food source contamination	1
Plastic in general	< 0.01	< 0.001
Microplastics	0.226	< 0.05	1
Climate change	< 0.001	< 0.001	0.134	< 0.01
Increase in global population	1	1	< 0.001	< 0.05	< 0.001
Drought	< 0.05	0.145	< 0.001	< 0.001	< 0.001	1
Toxic chemicals in the oceans*	< 0.05	< 0.01	1	1	< 0.01	< 0.01	< 0.001
B
Food source contamination	1
Plastic in general	< 0.001	< 0.001
Microplastics	< 0.001	< 0.001	1
Climate change	< 0.001	< 0.001	0.28	1
Increase in global population	1	1	< 0.001	< 0.001	< 0.001
Drought	0.07	1	< 0.001	< 0.001	< 0.001	1
Toxic chemicals in the oceans*	0.08	< 0.01	1	0.24	< 0.001	< 0.05	< 0.001