| Hint | Answer | % Correct |
|---|---|---|
| Type of rain caused by sulfur dioxide emissions | {Acid} rain | 95%
|
| Region of the atmosphere depleted by chlorofluorocarbons | {Ozone} layer | 91%
|
| The world's worst nuclear disaster, in 1986 | Chernobyl | 89%
|
| The three main fossil fuels | Oil | 88%
|
| Bird that went extinct in Mauritius in the 1600s, just a few decades after it was first observed | Dodo | 87%
|
| Type of animal threatened by "medicinal" use of its horn | Rhinoceros | 87%
|
| The two most abundant of those gases, other than water vapor | Carbon dioxide | 86%
|
| Annual event founded in 1972 to raise awareness of environmental issues | {Earth} Day | 84%
|
| In 2020, it represented 3.5% of world electricity generation, up from 0.01% in 2004 | {Solar} power | 83%
|
| Name for a gas that traps heat in the atmosphere | {Greenhouse} gas | 81%
|
| The three main fossil fuels | Coal | 80%
|
| The world's first national park | Yellowstone | 78%
|
| This Chinese delicacy is one reason for the decline in shark populations | {Shark} {fin} soup | 77%
|
| Country that built a 1000 mile "rabbit-proof fence" in an effort to contain invasive rabbits | Australia | 73%
|
| Creatures that can become "bleached" due to ocean acidification | Coral | 69%
|
| Term for the tiny animals and plants at the bottom of the food chain in the ocean | Plankton | 68%
|
| The two most abundant of those gases, other than water vapor | Methane | 67%
|
| First, and bestselling, model of hybrid vehicle | Toyota {Prius} | 61%
|
| The three main fossil fuels | Natural gas | 58%
|
| Major inland sea of Central Asia that has almost completely dried up | Aral Sea | 48%
|