Ecology and Environment

Clues in this puzzle

Across

• Large slow-moving ice mass. (7)
• Rich in various life forms. (10)
• Earth's gaseous protective layer. (10)
• Vast body of saltwater. (5)
• To protect from loss or harm. (8)

Down

• Natural air current. (4)
• Essential H2O. (5)
• Energy source that replenishes naturally. (9)
• Environmental effect. (6)
• Natural dwelling place for a species. (7)
• Wetland type. (5)
• Layer protecting from UV rays. (5)

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