Sustainability

2. substances can be separated into very small parts by bacteria so that they are not harmful to the environment
4. when certain gases in the atmosphere entrap infrared radiation
6. the act of putting new trees into a place where the original trees have been cut down
7. the process of damaging the air, water, or land with chemicals or other substances
9. the slow increase in the temperature of the Earth caused partly by the greenhouse effect increasing the amount of carbon dioxide in the atmosphere
10. the process of working to protect something valuable so that it is not damaged or destroyed
11. working to protect the environment

1. the process of removing the trees from an area of land
3. land is affected by both human-induced processes and environmental degradation
5. the business of creating and selling holidays that give people the chance to learn about a natural environment, and cause as little damage to the environment as possible
8. physical growth of urban areas
10. not having enough money for basic needs.