Percent of replies "fairly unwilling" and "very unwilling" to 12b: "And how willing would you be to pay much higher taxes in order to protect the environment?". Original replies include: (1) Very willing, (2) Fairly willing, (3) Neither willing nor unwilling, (4) Fairly unwilling, (5) Very unwilling, (8) Can't choose.

In Environment III (2010) - question 12b.
In Environment II (2000) - question 7b.
In Environment I (1993) - question 8b.

A higher score means that fewer people are willing to pay more taxes for environmental protection. A lower score means that more people are willing to pay higher taxes for environmental protection.