Unit 1

Part A New Estimates of Oil and Gas Resources in Alaska

Part B "Black Holes"Aren't Holes at All

Unit 2

Part A Poplar Trees Help Clean up the Environment

Part B Trees Could Affect Land Use,Reduce Skin Cancer

Unit 3

Part A The Impacts of Composting

Part B Converting Wet Bio-waste into Energy:Alternative to Land Application?

Unit 4

Part A ACID RAIN:What's the Solution

Part B Tropical Rivers Exhale Millions of Tons More CO2 than Thought

Unit 5

Part A Bioremediation-using the Trophic Diversity of Bacteria to Solve Environmental Problems

Part B Cancer and the Environment

Unit 6

Part A Obsolete Pesticides Threaten Environment

Part B Golf is an Environmental Hazard

Unit 7

Part A Garbage-Potential Resources

Part B Imagine No Restrictions on Fossil-fuel Usage and No Global Warming!

Unit 8

Part A Abundant Resources for Making Foods

Part B Pollution-related Diseases Kill Millions of Children a Year

Unit 9

Part A What's Wrong with Our Weather

Part B New Research Could Spearhead Permanent Nuclear Waste Storage

Unit 10

Part A The Oceans——Man's Last Great Resource

Part B Everybody's Problem——Hazard Waste

Unit 11

Part A New Technology of Air Pollution Control

Part B Garbage in,Garbage out

Unit 12

Part A Water Problems

Part B Diesel Particles in Air Slow Kids'Lung Development

Unit 13

Part A Basic Factors in Water Analysis

Part B Thunderstorms Are Affected by Pollution

Unit 14

Part A Solid Waste Disposal

Part B The Time Is Now

Unit 15

Part A Biological Treatment System

Part B The Invisible World of Industrial Gas

Unit 16

Part A Health Effects of Noise

Part B War Affects the Environment

Unit 17

Part A Water Purification

Part B Summary of EIA

Unit 18

Part A Water Treatment Processes

Part B Thermal Pollution

Afterclass Readings

Ⅰ Microbial Ecology

Ⅱ Fungus

Ⅲ Is All Environment about Wildlife?

Ⅳ Biological Control:Bacillus Popilliae

参考译文

Keys to Exercises

词汇表