At least 1 billion people live in crowded, unsanitary slums… At least 1 billion people live in crowded, unsanitary slums worldwide Read Details
The Montreal Protocol was designed to phase out substances t… The Montreal Protocol was designed to phase out substances that deplete the ozone layer, such as CFCs. Read Details
What is the main advantage of natural gas over coal? What is the main advantage of natural gas over coal? Read Details
Habitat protection is often considered more effective than s… Habitat protection is often considered more effective than species-by-species protection. Read Details
Which of the following gases is the most abundant contributo… Which of the following gases is the most abundant contributor to the greenhouse effect? Read Details
Which biome occurs where rainfall exceeds 200 cm per year an… Which biome occurs where rainfall exceeds 200 cm per year and temperatures are warm year-round? Read Details
Recycling aluminum uses about 1/20 of the energy required to… Recycling aluminum uses about 1/20 of the energy required to produce new aluminum. Read Details
Which gas has increased due to human activity, contributing… Which gas has increased due to human activity, contributing to climate change? Read Details
Top predators are usually small organisms at the base of the… Top predators are usually small organisms at the base of the ecological pyramid. Read Details
What is the largest compartment of liquid fresh water? What is the largest compartment of liquid fresh water? Read Details
