| 1 | 環境 | | environment | |
| 2 | 自然 | | nature | |
| 3 | 惑星 | | planet | |
| 4 | 地球 | | earth | |
| 5 | 空気 | | air | |
| 6 | 水 | | water | |
| 7 | 土壌 | | soil | |
| 8 | 森 | | forest | |
| 9 | ジャングル | | jungle | |
| 10 | 砂漠 | | desert | |
| 11 | 山 | | mountain | |
| 12 | 川 | | river | |
| 13 | 湖 | | lake | |
| 14 | 海洋 | | ocean | |
| 15 | ビーチ | | beach | |
| 16 | 島 | | island | |
| 17 | 気候 | | climate | |
| 18 | 天気 | | weather | |
| 19 | 汚染 | | pollution | |
| 20 | 廃棄物 | | waste | |
| 21 | ごみ | | trash | |
| 22 | ごみ | | garbage | |
| 23 | リサイクル | | recycling | |
| 24 | プラスチック | | plastic | |
| 25 | ガラス | | glass | |
| 26 | 紙 | | paper | |
| 27 | 金属 | | metal | |
| 28 | 有機 | | organic | |
| 29 | 堆肥 | | compost | |
| 30 | 埋め立て地 | | landfill | |
| 31 | 排出 | | emission | |
| 32 | 炭素 | | carbon | |
| 33 | 温室 | | greenhouse | |
| 34 | オゾン | | ozone | |
| 35 | スモッグ | | smog | |
| 36 | 酸性雨 | | acid rain | |
| 37 | 森林破壊 | | deforestation | |
| 38 | 侵食 | | erosion | |
| 39 | 干ばつ | | drought | |
| 40 | 洪水 | | flood | |
| 41 | ハリケーン | | hurricane | |
| 42 | 竜巻 | | tornado | |
| 43 | 地震 | | earthquake | |
| 44 | 火山 | | volcano | |
| 45 | 野生動物 | | wildlife | |
| 46 | 動物 | | animal | |
| 47 | 植物 | | plant | |
| 48 | 木 (Ki) | | tree | |
| 49 | 花 (Hana) | | flower | |
| 50 | 草 (Kusa) | | grass | |
| 51 | 生息地 (Seikatsuchi) | | habitat | |
| 52 | 生態系 (Seitaikei) | | ecosystem | |
| 53 | 生物多様性 (Seibutsu Tayōsei) | | biodiversity | |
| 54 | 種 (Shu) | | species | |
| 55 | 絶滅 (Zetsumetsu) | | extinction | |
| 56 | 保護 (Hogo) | | conservation | |
| 57 | 保護 (Hogo) | | protection | |
| 58 | 保護地帯 (Hogo Chitai) | | reserve | |
| 59 | 公園 (Kōen) | | park | |
| 60 | 聖域 (Seiiki) | | sanctuary | |
| 61 | エネルギー (Enerugī) | | energy | |
| 62 | 太陽 (Taiyō) | | solar | |
| 63 | 風 (Kaze) | | wind | |
| 64 | 水力 (Suiryoku) | | hydro | |
| 65 | 地熱 (Chikasui) | | geothermal | |
| 66 | 化石 (Kaseki) | | fossil | |
| 67 | 石炭 (Sekitan) | | coal | |
| 68 | 石油 (Sekiyu) | | oil | |
| 69 | ガス (Gasu) | | gas | |
| 70 | 燃料 (Nenryō) | | fuel | |
| 71 | 電池 (Denchi) | | battery | |
| 72 | 電気 (Denki) | | electricity | |
| 73 | 電力 (Denryoku) | | power | |
| 74 | 再生可能 (Saisei Kanō) | | renewable | |
| 75 | 持続可能 (Jizoku Kanō) | | sustainable | |
| 76 | 緑 (Midori) | | green | |
| 77 | 環境に優しい (Kankyō ni Yūyō) | | eco-friendly | |
| 78 | 有機 (Yūki) | | organic | |
| 79 | 肥料 (Hiryō) | | fertilizer | |
| 80 | 農薬 (Nōyaku) | | pesticide | |
| 81 | 化学物質 (Kagaku Busshitsu) | | chemical | |
| 82 | 毒素 (Doku) | | toxin | |
| 83 | 汚染 (Osen) | | contamination | |
| 84 | 清掃 (Seisō) | | cleanup | |
| 85 | 復元 (Fukugen) | | restoration | |
| 86 | 再植林 (Saishokurin) | | reforestation | |
| 87 | 植林 (Shokurin) | | afforestation | |
| 88 | 農業 (Nōgyō) | | agriculture | |
| 89 | 農家 (Nōka) | | farming | |
| 90 | 作物 (Sakumotsu) | | crop | |
| 91 | 収穫 (Shūkaku) | | harvest | |
| 92 | 灌漑 (Jōsui) | | irrigation | |
| 93 | 土壌 (Dojo) | | soil | |
| 94 | 栄養素 (Eiyōso) | | nutrient | |
| 95 | 種子 (Shushi) | | seed | |
| 96 | 芽 (Me) | | sprout | |
| 97 | 成長 (Seichō) | | growth | |
| 98 | 食物連鎖 | | food chain | |
| 99 | 捕食者 | | predator | |
| 100 | 獲物 | | prey | |
| 101 | 均衡 | | balance | |
| 102 | 資源 | | resource | |
| 103 | 鉱物 | | mineral | |
| 104 | 金属 | | metal | |
| 105 | 石 | | stone | |
| 106 | 砂 | | sand | |
| 107 | 氷河 | | glacier | |
| 108 | 氷山 | | iceberg | |
| 109 | 珊瑚 | | coral | |
| 110 | 礁 | | reef | |
| 111 | 潮 | | tide | |
| 112 | 波 | | wave | |
| 113 | 潮流 | | current | |
| 114 | 湿地 | | wetland | |
| 115 | 沼 | | swamp | |
| 116 | 湿原 | | marsh | |
| 117 | サバンナ | | savanna | |
| 118 | ツンドラ | | tundra | |
| 119 | 草原 | | prairie | |
| 120 | 牧草地 | | meadow | |