| 100% | GLOBALWARMING | 13 | Threat to the planet's ecosystem? |
| 51% | UBOAT | 5 | Threat to the Allies in W.W. II |
| 51% | UBER | 4 | Major threat to the taxi industry |
| 51% | ECO | 3 | ___-friendly (not harmful to the planet) |
| 50% | EARTHHOUR | 9 | Annual observance celebrating commitment to the planet |
| 49% | ENVIRONMENTALLY | 15 | As relates to the planet we live one |
| 49% | ORA | 3 | Local name given by Komodo Islanders to the ecosystem's dominant life form |
| 48% | NAMESAKE | 8 | The planet Neptune, to the god Neptune |
| 48% | ENVIRONMENTALLY | 15 | Relating to the global ecosystem |
| 47% | LIONS | 5 | Threats to Daniel, in the Book of Daniel |
| 47% | ACT | 3 | Alternative to the S.A.T. |
| 46% | PERSONAL | 8 | Pertaining to the self; __ planets, inner planets |
| 46% | TEAMB | 5 | CIA's 1976 project to analyze the Soviet Union threats (2 wds) |
| 45% | SYNODIC | 7 | Relating to the conjunction of stars or planets |
| 45% | WOLF | 4 | Threat to Little Red Riding Hood or the Three Little Pigs |
| 44% | MERCURY | 7 | Planet closest to the sun |
| 44% | MERCURY | 7 | Planet nearest to the sun |
| 44% | TERRAFORM | 9 | To shape another planet to resemble the earth |
| 44% | INDEXFUND | 9 | Investment pegged to the S&P 500, e.g. |
| 44% | MARS | 4 | Planet next to Earth in the solar system |
| 44% | ESE | 3 | S.F. to Vegas, as the crow flies |
| 43% | BIRDCAGE | 8 | __ Walk, London street to the S of St James's Park |
| 43% | SUN | 3 | Mercury is the closest planet to it |
| 43% | RECYCLE | 7 | To save the planet, reduce, reuse and __ |
| 43% | MERCURY | 7 | Fastest planet to travel around the sun |
| 43% | MARSROVER | 9 | Vehicle made to explore the Red Planet |
| 43% | ORBIT | 5 | The planet's movement around the sun |
| 43% | MERCURY | 7 | Closest planet to the sun |
| 43% | OCTAD | 5 | The planets, now that Pluto has been downgraded to an ice-covered dwarf planet |
| 42% | ORK | 3 | Planet where the cry "Shazbot!" is said to have originated |