BIOLOGY
| 1. ____ is the process by which substances potentially
harmful to ecosystems are added to the environment.
2. ________ is created when sulphur-containing pollution from factories mix with water in the atmosphere. 3. The protective ozone shield that surrounds our planet is being destroyed by ____________________. 4. Increasing levels of _____________. in the atmosphere may lead to global warming in the future. 5. Humans need to reduce pollution, find enough energy, and _____________. nonrenewable resources. 6. Special laws and “pollution permits” have been enacted to reduce _____________. in the U.S. 7. Nonrenewable energy resources include _____________., coal, and natural gas. 8. _____________. is one alternative to fossil fuels, though it has its problems. 9. Renewable energy resources include _____________. and wind power. 10. Three nonrenewable resources warrant need attention: fertile soil, ____________, and existing species. 11. The growth of _____________. is the major factor contributing to environmental pollution. 12. The first step in solving an environmental problem is _____________. 13. Carcinogens are substances that _________________. 14. Which is an example of a renewable resource? 15. Rain forest species are primarily becoming extinct due to ______________. 16. The major cause of acid rain is ___________________. 17. ESSAY: How can an individual help with the pollution problem? |