| A | B |
|---|
| auk | a chunky, short-winged seabird of northern regions |
| bamboo shoots | first part of bamboo |
| bison | a large wild animal, similar to a cow |
| breed | produce young animals or plants |
| carbon dioxide | the gas produced when animal or plant matter is burned (or exhausted) |
| cataracts | growths on eyes causing loss of sight |
| conservation | the controlled and systematic protection of natural resources |
| consume | use up |
| dam | to keep back water with a wall |
| dodo | large flightless bird, extinct since the 17th century |
| ecological | the relationships between organisms and their environments |
| expose(d) | to uncover |
| extinct | no longer existing |
| fertile | capable of initiating, sustaining, or suppporting reproduction |
| for instance | for example |
| go to great lengths | try very hard |
| ice age | time when ice covered many northern countries |
| incredibly | extremely unbelievable |
| intermesh | are linked |
| mammoths | large hairy animals, extinct |
| mines | a deposit of ore or minerals |
| ozone layer | protective layer around Earth, absorbs radiation |
| pollinated | enabled to produce seeds |
| preserve | to protect from injury or peril; to keep from harm |
| rare | not seen or found very often |
| siphon | to take away (as through a tube) |
| species | a group of animals or plants which are all similar |
| spread out | to open, reach |
| starve | to die from lack of food |
| take up more room | fill more space |
| wastefulness | spend or use carelessly |
| whooping crane | a type of large tall bird with very long legs and neck |
| wiped out | to destroy all of |
