The lower the score is, the more damage is done by climate change.
Possible score ranges from 6 to -23.

Temperature: How hot is your country on average? (as far as average, unadapted people are concerned)
Inhospitably cold / Uncomfortably cold / Tolerable / Uncomfortably hot / Inhospitably hot = +4 / +2 / 0 / -2 / -4

Peak temperatures: What are the highest temperatures of your country like? (for local wildlife and humans)
Tolerable / Uncomfortably high / Dangerously high = 0 / -2 / -4

Min temperatures: What are the lowest temperatures of your country like? (for local wildlife and humans)
Tolerable / Uncomfortably low / Dangerously low = 0 / -1 / -2

Landmass: What is the shape/size of the landmass your country is in?
Other / Big and bulbous = 0 / -1

Height: How much of your country is within a few metres of sea level? (floating ice will float of course)
Almost none / Partially / Largely / Almost all = -1 / -3 / -6 / -10

Forests: In the future, will your country be heavily forested, important for regulating moisture in high temperatures?
Yes / Partially / No = 0 / -1 / -2

Polar desert: Is your country covered by polar desert?
Almost entirely / Largely / Partially / No = +3 / +2 / +1 / 0

Floating ice: Is your country just ice floating on water?
No / Partially / Largely / Almost entirely = 0 / -1 / -3 / -10