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General

The home of the U.S. Government’s open data: here you will find data, tools, and resources to conduct research, develop web and mobile applications, design data visualizations, and more.
U.S. Government’s open data - Data.gov
The library of UN materials relevant for climate change learning;a part of the UN CC:Learn – The One UN Climate Change Learning Partnership. Resources organized by 1.      Organization (responsible for producing the library item), Type of Material, Language, and Date; and 2.      Search by Topic: Policy, Governance and Finance, Sectorial Issues, Cross Cutting All materials included in the UN CC:Learn library are publicly available documents.
UN CC: Learn Library
data.gov.uk is a UK Government project to make available non-personal UK government data as open data. Aims to promote innovation though encouraging the use and re-use of government data-sets. Includes a directory of data available and of applications making.
United Kinkdom Open Data - Data.Gov.UK
UNdata - a world of information, is an internet-based data service which brings UN statistical databases within easy reach of users through a single entry point. The Undata portal currenlty gives you access to 34 european databases.
United Nations data
​The data catalog is a list of datasets and databases available from the World Bank and other sources in several different formats. The catalog includes socio-economic indicators as well as historical and projected climate data available through an open-source applications programming interface (API)
World Bank Data Catalog
One of the most effective ways to display development indicators is through graphs and charts. A visual display of data makes comparisons easier and promotes a better understanding of trends.. They provide data dashboards on various topics as well as access to all the underlying data through our latest data visualization and sharing application, DataBank. Below, you will find list of many available portals:
World Bank Data Portals & Tools
several useful mobile apps for iOS and Android
WORLD BANK MOBILE APPS
The greenhouse gas equivalencies calculator can help you understand what reducing carbon dioxide (CO2) emissions by 1 million metric tons means in everyday terms.It is a web-based calculator to help communicate your greenhouse gas reduction strategy, reduction targets, or other initiatives aimed at reducing greenhouse gas emissions. It helps by translating abstract measurements into concrete terms you can understand, such as "equivalent to avoiding the carbon dioxide emissions of 183,000 cars annually."
Greenhouse Gas Equivalencies Calculator
In order to underpin scenario analysis of the World Energy Outlook, an extensive effort is made to update and expand the list of energy and climate-related policies and measures that feed into our modelling. Assumptions about government policies are critical to this analysis and over 3 000 policies and measures in OECD and non-OECD countries have been considered during the WEO preparation.
IEA World Enery Outlook Policies database
The 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories was adopted and accepted during the 49th Session of the IPCC in May 2019. It was prepared by the Task Force on National Greenhouse Gas Inventories (TFI) in accordance with the decision taken at the 44th Session of IPCC in Bangkok, Thailand, in October 2016.

The  2019 Refinement was considered in May 2019 during the IPCC’s 49th Session (Kyoto, Japan) and adopted/accepted on 12 May 2019
IPCC 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories
AR5 Climate Change 2014: Mitigation of Climate Change
The Working Group III contribution to the IPCC’s Fifth Assessment Report (AR5) assesses literature on the scientific, technological, environmental, economic and social aspects of mitigation of climate change since 2007 when the Fourth Assessment Report (AR4) was released.
IPCC Fifth Assessment Report
SPECIAL REPORTGlobal Warming of 1.5 ºC
An IPCC special report on the impacts of global warming of 1.5 °C above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty.
IPCC Special Report Global Warming of 1.5 ºC
The Organization for Economic Co-operation and Development is an international economic organization of 34 countries founded in 1961 to stimulate economic progress and world trade. OECD.Stat enables users to search for and extract data from across OECD's many databases. OECD.Stat includes data and metadata for OECD countries and selected non-member economies.
OECD.StatExtracts
Open EI - Open Energy Information is an international knowledge sharing online community dedicated to connecting people with the latest energy information and data. Open EI uses open data to connect people with accessible and machine-readable energy data
Open EI - Open Energy Information
​The reegle thesaurus is one of the most comprehensive thesauri (more than 2000 terms) describing the field of renewables, efficiency, REDD, green growth and climate change.

Most terms are explained in reegle’s wording, enriched by definitions from Wikipedia and linked to other thesauri like the AGROVOC from FAO.
A visual browser shows how a term is connected through related terms which help understanding the scope of a concept or technology even when there isn’t a definition available. The whole
glossary/thesaurus is available free for re-use in RDF format.
Reegle Clean Energy and Climate Change Glossary and Thesaurus
The reegle.info tagging API has been developed for automated tag extraction of clean energy and climate relevant resources. Tagging the information in individual documents makes them much more accessible, but the actual process of tagging documents is both time-consuming and inconsistent when done manually. On top of this, there is often no consistent set of tags to cover a specific field such as clean energy.  A "light" version of the Tagging API allows you to upload and tag documents directly - for the full version you can integrate the API into your publishing environment to support tagging of all your documents . It’s easy.Simply register to get an API key. This service is available for resources in the English, Spanish, Portuguese, French and German languages.   Another service is the API content pool: this semantic index allows API key holders to receive similar content suggestions that match their API return values. This is a list of URIs of similar articles that are already indexed by the reegle API. The API content pool includes key holders’ own documents as well as a selection of publicly available resources. These include reegle.info Linked Open Data (LOD) and content, including actor and stakeholder profiles, policy and regulatory overviews for most countries, and REEEP project outcome documents. Additional related data and content from other LOD cloud sources may also be available.
Reegle tagging API
​The EU Open Data Portal is your single point of access to a growing range of data produced by the institutions and other bodies of the European Union.
Data are free to use, reuse, link and redistribute for commercial or non-commercial purposes.
European Union Open Data Portal
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