On 19 March 2019 (10:00 AM -1:00 PM CET)UN Environment, the International Institute for Sustainable Development (IISD), and the MAVA Foundation are are holding "Sustainable Infrastructure: 

Organisation :
Secretariat of Water Resources and Environmental Quality Brasília
Agência Nacional de Águas e Saneamento Básico (ANA)
Instituto Brasileiro de Geografia e Estatística (IBGE)

This report, Environmental-Economic Accounting for Water in Brazil 2013-2015, presents the first results from the Environmental-Economic Accounts for Water (EEA-W) in Brazil and provides strategic information that aims to support sectoral planning and management actions, as well as economic and water resources actions, by diagnosing how water is used by the Brazilian economic sector.

On 14 March 2019 (7:00 AM - 3:00 PM CET), One Planet and the World Bank Group are hosting the 3rd One Planet Summit in Nairobi, Kenya. The Summit is invite-only, but a live-stream is available and you can submit a question in advance.
On 26-27 November 2019, the OECD is holding the annual Green Growth and Sustainable Development (GGSD) Forum on the theme of "Greening heavy and extractive industries: innovation and fiscal sustainability" in Paris, France.
On 3-5 June 2019, the Finnish Innovation Fund Sitra is hosting the World Circular Economy Forum 2019 (WCEF2019) on the theme of "A carbon-neutral circular economy" in Helskini, Finland.
On 8 April 2019, the United Nations Economic Commission for Europe (UNECE) is hosting Day of Cities in Geneva, Switzerland.
On 15-17 May 2019, the Food and Agriculture Organization (FAO), the Global Soil Partnership (GSP), the Intergovernmental Technical Panel on Soils (ITPS), the United Nations Convention to Combat Desertification Science-Policy Interface (UNCCD-SPI) and the Joint FAO/IAEA International Atomic Energy Agency are hosting the Global Symposium on Soil Erosion (GSER19) in Rome, Italy.
On 19-20 February 2019, Covenant of Mayors for Climate & Energy - Europe and the European Commission are hosting Covenant of Mayors Investment Forum – Energy Efficiency Finance Market Place in Brussels, Belgium.
On 25 - 28 May 2019, the Geneva Environment Lab is hosting Innovation Week in Geneva, Switzerland.
The UN Environment Finance Initiative (UNEP FI) Regional Roundtable for Sustainable Finance in Africa and Middle East will take place on 10-11 April 2019 in Cairo, Egypt.