Generate an effective opening sentence to an essay about the importance of conserving the environment.
The earth's environment is teetering on the edge of doom, and each of us has a responsibility to preserve it.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Generate an effective opening sentence to an essay about the importance of conserving the environment.

### Response:
The earth's environment is teetering on the edge of doom, and each of us has a responsibility to preserve it.