**7. Conclusion**

In this study, the data review and analysis show that amount of municipal, industrial, and commercial waste are continuing to grow, continuously shrinking the remaining landfill space in New Jersey. Landfilling waste remains the best option for disposal, but New Jersey is a densely populated state without much capacity or areas to expand and create landfills. Even though landfill designs have improved significantly, many old landfills continue to pollute the air, groundwater, surface water, and soil. Cost benefit analysis followed by an appropriate cleanup strategy should be carefully implemented to clean up each contaminated site. While New Jersey implements innovative technologies to recover landfill space and remediate contaminated sites for redevelopment opportunities, most of these techniques continue to require many years of execution
