Desertification is the degradation of land in arid, semi-arid and dry sub-humid areas. It is caused primarily by human activities and climatic variations. Desertification does not refer to the expansion of existing deserts. It occurs because dryland ecosystems, which cover over one third of the world's land area, are extremely vulnerable to overexploitation and inappropriate land use. Poverty, political instability, deforestation, overgrazing and bad irrigation practices can all undermine the productivity of the land.
The World Day to Combat Desertification and Drought is observed every year to promote public awareness of international efforts to combat desertification. The day is a unique moment to remind everyone that land degradation neutrality is achievable through problem-solving, strong community involvement and co-operation at all levels.
Even more specially these times, considering the COVID-19 situation. Actions based on the clear understanding of rights, rewards and responsibilities of land management can help address the COVID-19 fallout by tackling one of the primary environmental drivers of emerging infectious disease outbreaks. At the same time, strengthening the resilience of our food and water systems, can help reduce the effects of the pandemic on global poverty and food insecurity. Today, the motto “healthy land = healthy people” promoted by the Convention to Combat Desertification, is more true than ever.

2020 Theme: Food. Feed.Fibre. - the links between consumption and land
This year’s observance is focused on changing public attitudes to the leading driver of desertification and land degradation: humanity’s relentless production and consumption.
As populations become larger, wealthier and more urban, there is far greater demand for land to provide food, animal feed and fibre for clothing. Meanwhile, the health and productivity of existing arable land is declining, worsened by climate change.
To have enough productive land to meet the demands of ten billion people by 2050, lifestyles need to change. World Day to Combat Desertification and Drought, under the slogan “Food. Feed. Fibre.” seeks to educate individuals on how to reduce their personal impact. Read fiurther from the link above