| Hint | Answer | % Correct |
|---|---|---|
| Greenhouse gas starting with the letter M | Methane | 90%
|
| Greenhouse gas starting with the letter C | Carbon dioxide | 87%
|
| A long, high sea wave commonly caused by an earthquake | Tsunami | 84%
|
| Animal that produces methane | Cow | 71%
|
| Path / road over body of water | Bridge | 68%
|
| Panels which provide electricity by converting sunlight | Solar panels | 68%
|
| Red bridge in San Francisco | Golden Gate Bridge | 55%
|
| Greenhouse gas starting with the letter N | Nitrous oxide | 42%
|
| About how many earthquakes occur each day | 50 | 29%
|
| Biggest dam in the world | Three Gorges Dam | 13%
|
| Longest tunnel in the world | Gotthard base tunnel | 3%
|