| Prius and Volt | 14 |
| High-m.p.g. vehicles | 20 |
| Polluter's crime | 20 |
| Environmental disaster | 22 |
| Habitat destruction, e.g. | 25 |
| Environmental nightmare | 23 |
| Environmental destruction | 25 |
| Deforestation, e.g. | 19 |
| Chemical dumping, e.g. | 22 |
| Environmental extremist | 23 |
| Locavore whose car runs on used fryolator oil, say | 50 |
| Environmental activist, to some | 31 |
| Green nuts? | 11 |
| Environmentalist's test site | 32 |
| Big name in food safety | 23 |
| Big name in water purification | 30 |
| Clean-air legislation, e.g. | 27 |
| Mandatory recycling, e.g. | 25 |
| Green rules, collectively | 25 |
| Environment-related regulation | 30 |
| Body of environmental regulations | 33 |
| Ban on strip mining, e.g. | 25 |
| Environmental legislation | 25 |
| Where earth-conscious French students study? | 44 |
| Environment-related | 19 |
| Relating to environment | 23 |
| Relating to our environment | 27 |
| Of our surroundings and us | 26 |
| Environment-related, like the lyrics to "Mercy Mercy Me" | 66 |
| Life preservers? | 16 |
| Environmental science | 21 |
| Pollution concern | 17 |
| Bionomics | 9 |
| Tree-hugger's concern | 25 |
| Study of organisms and habitats | 31 |
| Science of today | 16 |
| Science dealing with pollution | 30 |
| Popular science | 15 |
| Major at Cornell | 16 |
| Green science | 13 |
| Environment study | 17 |
| Biology branch | 14 |
| Population and pollution, e.g. | 30 |
| Net trading | 11 |
| Source of net receipts | 22 |
| Growing part of the economy | 27 |
| Showing car-rental preference? | 30 |
| Ford van | 8 |
| Van introduced in 1960 | 22 |
| Popular Ford van | 16 |
| Classic Ford van | 16 |
| Bygone Ford van | 15 |
| Eschewing waste | 15 |
| Major financial concern | 23 |
| Health plan's exclusion for stockholders? | 45 |
| Financial projections | 21 |
| Friedrich Hayek's field | 27 |
| Financial considerations | 24 |
| Field involving scarcity and elasticity | 39 |
| Two home fronts? | 16 |
| Use of blockades, say | 21 |
| Magazine with a "GNP Poker" section? | 46 |
| Fed experts | 11 |
| Frugality | 9 |
| Car rental choice | 17 |
| Airline seating class | 21 |
| Thrift | 6 |
| President's concern | 23 |
| Market concern | 14 |
| Thrifty management | 18 |
| Subject of many campaign speeches | 33 |
| Seating class | 13 |
| Presidential debate topic, with “the” | 45 |
| Perennial debate topic | 22 |
| Low-cost, as an airplane seat | 29 |
| Keynesian concern | 17 |
| Keynes's topic | 18 |
| It may be fueled and driven | 27 |
| Fiscal management | 17 |
| Fed concern | 11 |
| Carefulness with spending | 25 |
| Beryl Sprinkel's concern | 28 |
| Tercels and Prizms, e.g. | 24 |
| Geo Metro and Kia Sephia | 24 |
| Low-priced drink holder? | 24 |
| Budget-minded buy | 17 |
| PDF file, e.g. | 14 |
| Page of many library websites | 29 |
| Â Â "The Da Vinci Code," e.g. | 45 |
| Umberto and kin | 15 |
| Reverberations in Spain | 23 |
| Earth Friendly Products detergent | 33 |
| Belonging to Umberto | 20 |
| Author Umberto et al. | 21 |
| UN organ | 8 |
| U.N. division | 13 |
| Life-support system | 19 |
| Earth's habitable parts | 27 |
| Scotland, to Pierre | 19 |
| Community of organisms | 22 |