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thus includes not only the millions of different species on Earth; 5 “it also consists of the
specific genetic variations and traits within species (such as different crop varieties), and
the assemblage of these species within ecosystems that characterize agricultural and other
landscapes such as forests, wetlands, grasslands, deserts, lakes and rivers”.6
10.
In the words of the Millennium Ecosystem Assessment, “biodiversity is the
foundation of ecosystem services to which human well-being is intimately linked”. 7
Biodiversity supports ecosystem services and the human rights that depend upon them in
many ways. In general, biodiversity contributes to the productivity and stability of
ecosystem processes.8 More diverse ecosystems are more resilient to disasters and to longterm threats such as climate change. 9 More specifically, biodiversity contributes to
particular ecosystem services that directly support the full enjoyment of human rights. The
present report highlights some of those contributions with respect to: the rights to life and
health; the right to an adequate standard of living; and the right to non-discrimination in the
enjoyment of rights.
1.
Rights to life and health
11.
The Universal Declaration of Human Rights (art. 3) and the International Covenant
on Civil and Political Rights (art. 6) recognize the right to life. The Human Rights
Committee has emphasized that the right to life should not be interpreted narrowly, and that
the protection of the right requires States to adopt positive measures such as measures to
reduce infant mortality and increase life expectancy. 10 The Constitution of the World Health
Organization and article 12 of the International Covenant on Economic, Social and Cultural
Rights recognize the right to the highest attainable standard of physical and mental health.
The Committee on Economic, Social and Cultural Rights has stated that the right to health
“extends to the underlying determinants of health, such as food and nutrition, housing,
access to safe and potable water and adequate sanitation, safe and healthy working
conditions, and a healthy environment”.11
12.
Of the many connections between biodiversity and healthy human life, the present
report focuses on four, relating to medicinal drugs, microbial diversity, infectious diseases
and mental health.12
5
6
7
8
9
10
11
12
Although estimates of species vary widely, a recent estimate is that there is about 7.7 million species
of animals and about 8.7 million eukaryotic species in all, of which only about 1.2 million have been
catalogued. Camilo Mora and others, “How many species are there on Earth and in the ocean?”,
PLOS Biology, vol. 9, No. 8 (2011), p. 1.
World Health Organization (WHO) and Secretariat of the Convention on Biological Diversity,
Connecting Global Priorities: Biodiversity and Human Health — a State of Knowledge Review
(Geneva, 2015), p. 28.
Millennium Ecosystem Assessment, Ecosystems and Human Well-being: Biodiversity Synthesis
(World Resources Institute, Washington, D.C., 2005), p. 18.
Connecting Global Priorities, p. 34; Bradley J. Cardinale and others, “Biodiversity loss and its impact
on humanity”, Nature, vol. 486, (June 2012), p. 59.
Connecting Global Priorities, p. 18.
General comment No. 6 (1982) on the right to life, para. 5.
General comment No. 14 (2000) on the right to the highest attainable standard of health, para. 4.
A particularly useful resource is the 2015 report of WHO and the Secretariat of the Convention on
Biological Diversity cited above (see footnote 6), which contains a summary of the state of
knowledge on biodiversity and human health and which is available at
https://www.cbd.int/health/stateofknowledge. See also Eric Chivian and Aaron Bernstein, eds.,
Sustaining Life: How Human Health Depends on Biodiversity (Oxford University Press, 2008).
5
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