by 
The Curious Bag
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According to the Environmental Protection Agency (EPA), batteries contain heavy metals that can contaminate the environment if not recycled. Many states have adopted specific legislation to mandate battery recycling.
Recycling
The first step in battery recycling is separating batteries from other common household products. Labels on the battery should be examined for further instructions detailing how to dispose of or recycle them properly.
Types
Lead acid batteries are recycled with the help of a hammer mill that breaks the battery into smaller pieces. The plastic and metal pieces are then separated in a vat, and the liquids are drained off.
Fun Fact
According to the EPA, up to 3 billion dry cell batteries are purchased every year by Americans.
Warning
Improper disposal of batteries can produce water pollution, air pollution and skin or eye burns.
Prevention/Solution
Purchasing rechargeable batteries can reduce the number of batteries that end up in hazardous landfills. Additionally, you may consider purchasing batteries composed of less mercury.
Source:
Environmental Protection Agency: Batteries
Battery Solutions: End Sites Recycling Processes
Environment, Health and Safety Online: Battery Recycling and Disposal Guide for Households
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