Environmental Greenhouse Gases Reach Record Levels, Could Rise Further, Warns UN Agency by Gary Kopycinski on November 24, 2010 Gary Kopycinski Author More in Environmental: People Outside Will Be Injured: Severe Thunderstorms Strike Park Forest March 31, 2026 Park Forest Officials Urge Residents to Protect Pipes as Coldest Air of the Season Continues December 14, 2025 Park Forest Workshops Join Global Effort to Prevent Bird Collisions August 21, 2025 NEW YORK–(ENEWSPF)–24 November 2010 – The main greenhouse gases have reached their highest concentration levels since pre-industrial times, a United Nations climate research body said today.