Natural resources and conservation Crossword

Rain that has acids in it
The increase in the temperature of the earth's atmosphere
The cutting down and removing of trees from a large area
Carbon monoxide is found in these and they can cause brain damage and heart disease.
Tourism related to holidays that include visiting conservation areas and looking after and learning from them.
When an animal or plant species is in danger of disappearing or becoming extinct
The variety of different living organisms in an area.
The limited number of people or quantity of things officially allowed.
When something is natural or limited to a certain region.
An area of land that is mostly covered with water.
Taking good care of the world and it's land, rivers, plants and animals
To move from one part of the world to another every year.
When a plant or animal lives or grows in an area where it is originally from.
A marine fish, known under the name elf on the West Coast
A kind of rock formed by volcanic activity
Across the borders of different countries
The natural place where a plant or animal lives
Beautiful things such as mountains, rivers and forests that you see around you in the countryside
The dead bodies of animals
A natural resource burned for energy