Each year celebration of the World Environment Day is based on the particular theme decided by the United Nations to make the celebration more effective by encouraging mass people worldwide to hugely take part in addressing environmental issues on global scale. Year wise list of the themes and slogans of world environment day are mentioned below:

• The theme of the year 2016 was “Zero tolerance for the illegal trade in wildlife” (highlights the fight against the illegal trade in wildlife).
• The theme of the year 2015 was “One World, One Environment”.
• The theme of the year 2014 was “small island developing states” or “SIDS” and “Raise your voice, not the sea level”.
• The theme of the year 2013 was “Think. Eat. Save.” And slogan was “Reduce Your Foodprint”.
• The theme of the year 2012 was “Green Economy: Does it include you?”.
• The theme of the year 2011 was “Forests: Nature at your Service”.
• The theme of the year 2010 was “Many Species. One Planet. One Future”.
• The theme of the year 2009 was “Your Planet Needs You – Unite to Combat Climate Change”.
• The theme and slogan of the year 2008 was “CO2, Kick the Habit – Towards a Low Carbon Economy”.
• The theme of the year 2007 was “Melting Ice – a Hot Topic?”.
• The theme of the year 2006 was “Deserts and Desertification” and slogan was “Don’t Desert Drylands!.”
• The theme of the year 2005 was “Green Cities” and slogan was “Plan for the Planet!”.
• The theme of the year 2004 was “Wanted! Seas and Oceans” and slogan was “Dead or Alive?”.
• The theme of the year 2003 was “Water” and slogan was “Two Billion People are Dying for It!”.
• The theme of the year 2002 was “Give Earth a Chance”.
• The theme of the year 2001 was “Connect with the World Wide Web of Life”.
• The theme of the year 2000 was “The Environment Millennium” and slogan was “Time to Act”.
• The theme of the year 1999 was “Our Earth – Our Future” and slogan was “Just Save It!”.
• The theme of the year 1998 was “For Life on Earth and slogan was “Save Our Seas”.
• The theme of the year 1997 was “For Life on Earth”.
• The theme of the year 1996 was “Our Earth, Our Habitat, Our Home”.
• The theme of the year 1995 was “We the Peoples: United for the Global Environment”.
• The theme of the year 1994 was “One Earth One Family”.
• The theme of the year 1993 was “Poverty and the Environment and slogan was “Breaking the Vicious Circle”.
• The theme of the year 1992 was “Only One Earth, Care and Share”.
• The theme of the year 1991 was “Climate Change. Need for Global Partnership”.
• The theme of the year 1990 was “Children and the Environment”.
• The theme of the year 1989 was “Global Warming; Global Warning”.
• The theme of the year 1988 was “When People Put the Environment First, Development Will Last”.
• The theme of the year 1987 was “Environment and Shelter: More Than A Roof”.
• The theme of the year 1986 was “A Tree for Peace”.
• The theme of the year 1985 was “Youth: Population and the Environment”.
• The theme of the year 1984 was “Desertification”.
• The theme of the year 1983 was “Managing and Disposing Hazardous Waste: Acid Rain and Energy”.
• The theme of the year 1982 was “Ten Years after Stockholm (Renewal of Environmental Concerns)”.
• The theme of the year 1981 was “Ground Water; Toxic Chemicals in Human Food Chains”.
• The theme of the year 1980 was “A New Challenge for the New Decade: Development without Destruction”.
• The theme of the year 1979 was “Only One Future for Our Children and slogan was “Development without Destruction”.
• The theme of the year 1978 was “Development without Destruction”.
• The theme of the year 1977 was “Ozone Layer Environmental Concern; Lands Loss and Soil Degradation”.
• The theme of the year 1976 was “Water: Vital Resource for Life”.
• The theme of the year 1975 was “Human Settlements”.
• The theme of the year 1974 was “Only one Earth during Expo ’74”.
• The theme of the year 1973 was “Only one Earth”.