Table 6 Kendall’s Tau-b correlations between source of hydrogen production, attitudes and support

“Hydrogen must be produced from exclusively renewable sources, even if this means higher production costs”

τb

–

p

N

73

“Hydrogen must be produced from renewable and non-renewable sources to reduce production costs”

τb

− 0.518**

–

p

< 0.001

N

73

73

“Hydrogen should be produced from exclusively renewable sources, but only if it does not increase production costs” [Control variable]

τb

− 0.358**

0.248*

–

p

0.001

0.010

N

73

73

73

“I am in favor of investing in hydrogen technologies in my country"

τb

0.099

0.142

− 0.123

–

p

0.336

0.153

0.223

N

73

73

73

73

“The use of hydrogen as an energy source is good for the environment.”

τb

− 0.024

0.186

−0.050

0.548**

–

p

0.815

0.059

 0.617

< 0.001

N

73

73

73

73

73

“The consequences of using hydrogen are acceptable for future generations”

τb

0.030

0.120

− 0.038

0.548**

0.793**

–

p

0.770

0.230

0.706

< 0.001

< 0.001

N

73

73

73

73

73

73