Across
- 1. acid rain- from soil clay particles and flow into streams and lakes.
- 2. more than 1,200 animal species and 4700 plant species.
- 3. is the scientific analysis and studying.
- 7. organism or of a group of kinds usually a species.
- 10. with negative connotation of accompanying environmental.
- 12. forest areas across the world that are lost other uses such as agriculture croplands or mining activities.
- 13. as loss of species ecosystem due to pollution and human activities.
Down
- 1. ethanol-emission of carbon dioxide a green house gas.
- 2. two thirds of landfill waste is biodegrable
- 4. environment in which a particular species of organism lives.
- 5. standards and which are identified as such by a special color.
- 6. of the landscape into smaller and more isolated pieces.
- 8. the global warming of earth climate.
- 9. of predators and prey to detect one another.
- 11. are controlled by external and internal factors.