CBSE Class 7 Answered

Expired medications: 

• It's important not to use medications past their expiration date as they may have degraded in potency or could even become harmful.
• Proper disposal methods for expired medications typically involve taking them to a pharmacy or participating in a local medication take-back program.
• These programs ensure safe disposal and sometimes facilitate the recycling of certain medications.

Used Battery Cells:

• Batteries contain chemicals that can be harmful to the environment if not disposed of properly.
• Many communities have specific guidelines for disposing of batteries. Some require them to be taken to particular recycling centers or hazardous waste facilities.
• Some retailers also have battery recycling programs where you can drop off used batteries for proper disposal or recycling. 
• So in both cases, we can see that proper disposal methods are essential without which they can be harmful for human beings as well as environment.