Sustainable Development Goal 15 (SDG 15 or Global Goal 15) is about "Life on land". One of the 17 Sustainable Development Goals established by the United Nations in 2015, the official wording is: "Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss". The Goal has 12 targets to be achieved by 2030. Progress towards targets will be measured by 14 indicators. The nine "outcome targets" include: Conserve and restore terrestrial and freshwater ecosystems; end deforestation and restore degraded forests; end desertification and restore degraded land; ensure conservation of mountain ecosystems, protect biodiversity and natural habitats; protect access to genetic resources and fair sharing of the benefits; eliminate poaching and trafficking of protected species; prevent invasive alien species on land and in water ecosystems; and integrate ecosystem and biodiversity in governmental planning. The three "means of achieving targets" include: Increase financial resources to conserve and sustainably use ecosystem and biodiversity; finance and incentivize sustainable forest management; combat global poaching and trafficking. Humans depend on earth and the oceans to live. This goal aims at securing sustainable livelihoods that will be enjoyed for generations to come. The human diet is composed 80% of plant life, which makes agriculture a prime economic resource. Forests cover 30 percent of the Earth's surface, provide vital habitats for millions of species, and important sources for clean air and water, as well as being crucial for combating climate change. An annual report is prepared by the Secretary-General of the United Nations evaluating the progress towards the Sustainable Development Goals. The proportion of forest area fell, from 31.9 per cent of total land area in 2000 to 31.2 per cent in 2020, representing a net loss of nearly 100 million ha of the world's forests. This was due to decreasing forest area decreased in Latin America, sub-Saharan Africa and South-Eastern Asia, driven by deforestation for agriculture. Desertification affects as much as one-sixth of the world's population, 70% of all drylands, and one-quarter of the total land area of the world. It also leads to spreading poverty and the degradation of billion hectares of cropland. A report in 2020 stated that globally, the species extinction risk has worsened by about 10 per cent over the past three decades. Targets, indicators and progress The UN has defined 12 Targets and 14 Indicators for SDG 15.