What to do for this month earth day?

Perhaps young generation can do something such as reduce plastic bags in the environment. Plastic bags may choke rivers and cause flood. Beside that plastic can contaminate our environment or by mistake eaten by animals.World Environment Day 2010 Theme - “Biodiversity — Ecosystems Management and the Green Economy”
World Environment Day 2009 Theme - "Your Planet Needs You - UNite to Combat Climate Change"
World Environment Day 2008 Theme - "Kick The Habit - Towards A Low Carbon Economy"
World Environment Day 2007 Theme - "Melting Ice – a Hot Topic?"
World Environment Day 2006 Theme - "Deserts and Desertification - Don't Desert Drylands!"
World Environment Day 2005 Theme - "Green Cities – Plan for the Planet!"
World Environment Day 2004 Theme - "Wanted! Seas and Oceans – Dead or Alive?"
World Environment Day 2003 Theme - "Water – Two Billion People are Dying for It!"
World Environment Day 2002 Theme - "Give Earth a Chance"
World Environment Day 2001 Theme - "Connect with the World Wide Web of Life"
World Environment Day 2000 Theme - "The Environment Millennium - Time to Act"
World Environment Day 1999 Theme - "Our Earth - Our Future - Just Save It!"
World Environment Day 1998 Theme - "For Life on Earth - Save Our Seas"
World Environment Day 1997 Theme - "For Life on Earth"
World Environment Day 1996 Theme - "Our Earth, Our Habitat, Our Home"
World Environment Day 1995 Theme - "We the Peoples: United for the Global Environment"
World Environment Day 1994 Theme - "One Earth One Family"
World Environment Day 1993 Theme - "Poverty and the Environment - Breaking the Vicious Circle"
World Environment Day 1992 Theme - "Only One Earth, Care and Share"
World Environment Day 1991 Theme - "Climate Change. Need for Global Partnership"
World Environment Day 1990 Theme - "Children and the Environment"
World Environment Day 1989 Theme - "Global Warming; Global Warning"
World Environment Day 1988 Theme - "When People Put the Environment First, Development Will Last"
World Environment Day 1987 Theme - "Environment and Shelter: More Than A Roof"
World Environment Day 1986 Theme - "A Tree for Peace"
World Environment Day 1985 Theme - "Youth: Population and the Environment"
World Environment Day 1984 Theme -"Desertification"
World Environment Day 1983 Theme - "Managing and Disposing Hazardous Waste: Acid Rain and Energy"
World Environment Day 1982 Theme - "Ten Years After Stockholm (Renewal of Environmental Concerns)"
World Environment Day 1981 Theme - "Ground Water; Toxic Chemicals in Human Food Chains"
World Environment Day 1980 Theme - "A New Challenge for the New Decade: Development Without Destruction"
World Environment Day 1979 Theme - "Only One Future for Our Children - Development Without Destruction"
World Environment Day 1978 Theme - "Development Without Destruction"
World Environment Day 1977 Theme - "Ozone Layer Environmental Concern; Lands Loss and Soil Degradation"
World Environment Day 1976 Theme - "Water: Vital Resource for Life"
World Environment Day 1975 Theme - "Human Settlements"
World Environment Day 1974 Theme - "Only one Earth"