Question of the Week: What have you done to protect your home against radon?

Each week we ask a question related to the environment. Please let us know your thoughts as comments. Feel free to respond to earlier comments or post new ideas. Previous questions.

Radon is a naturally occurring radioactive gas, but it can build up inside homes and cause lung cancer (it’s number 2, after smoking). You can buy radon test kits to check for radon, improve home ventilation, and other things. January is National Radon Action Month.

What have you done to protect your home against radon?