How to Play
The 16 words you can see can be divided into 4 groups of 4 words each.
All puzzles are themed on climate change and environment.
Select four items that belong to the same group/category and tap Submit to check your answer.
You can click on hint to see what the category is. On the leaderboard, each hint adds 30 seconds to your time.
You can make up to 4 mistakes!
Category Examples
Season: Summer, Winter, Spring, Autumn
Carbon ____: Tax, Credit, Sink, Cycle
Each puzzle has exactly one solution. Watch out for words that seem to fit more than one group!
Each group is colour-coded, revealed as you solve
Straightforward
Medium
Tricky
Devious