Challenger

Important International years:

• International year of mountains - 2002
• International year of rice - 2004 
• International year of physics - 2005 
• International year of desert and desertification - 2006 
• International year of languages - 2008 
• International year of planet Earth - 2008
• International year of biodiversity - 2010 
• International year of forest - 2011
• International year of chemistry - 2011 
• International year of sustainable energy for all - 2012
• International year of soil - 2015 
• International year of light and light based technology - 2015
• International year of pulses - 2016 
• International year of sustainable tourism for development - 2017
• International year of periodic table and chemical elements - 2019 
• International year of indigenous languages - 2019 
• International year of artisanal fisheries and aquaculture - 2022
• International year of camelids - 2024