Science and knowledge are critically important to enable society to
understand and respond to threats posed by climate change. Decision
makers need sound information on vulnerabilities to climate change
grounded in the best science available. Equally important is sound
information on the potential social and economic impacts of climate
change, particular on more vulnerable groups like the extreme poor.
UNEP has a legacy of facilitating credible impact assessments based
on the drivers-pressures-state-impact-responses (DPSIR) framework used
for the Global Environment Outlook (GEO) series. It has developed
different vulnerability and impact assessment (VIA) methodologies
suitable for different purposes, including climate change VIA assessment
at the national and municipal levels. Assessments respond to demands
from Governments, and are normally led by them. They aim to support
development of effective and costed adaptation options, and to create
more clarity on the choices available to decision makers based on sound
science and knowledge. The scientific and assessment activities lay the
foundation for UNEP’s policy support and capacity building work.
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