How can you identify a gas leak in a building?

Identifying a gas leak in a building is crucial for safety, and the key indicators include specific odors and the use of specialized equipment. The presence of a smell resembling rotten eggs is often associated with the odorant added to natural gas, making it a distinctive and alarming sign of a possible leak. This odor serves as a warning that should not be ignored.

Additionally, gas detectors are devices designed specifically to detect the presence of gas in the air. They can detect even small amounts of gas, providing an additional layer of safety by alerting individuals to potential leaks before they become dangerous. Therefore, using these two methods—recognizing the telltale smell of natural gas and utilizing gas detection equipment—constitutes a reliable approach for identifying gas leaks in a building.

The other options may not effectively indicate a gas leak. Condensation on windows, unusual noises from appliances, and monitoring the water meter are not specific indicators of gas leaks. While they may signal other issues, they do not provide the clear, immediate warning that a gas leak might entail.