Consider this: The $400 billion in private environmental finance needed annually, according to Credit Suisse and McKinsey & Company, is eight times even the more generous current estimates of conservation finance. Practitioners and experts gathered last month at the New York City office of Credit Suisse to explore how to bridge that gap and meet the conservation objectives of the United Nations 2030 Sustainable Development Goals. Conservation Finance Network cohosted the event. Here are some key insights from the conversation.

Dramatic increases in investment in conservation over the last decade are the focus of a new report authored by Forest Trends’ Ecosystem Marketplace, “State of Private Investment in Conservation 2016.” The report sheds light on the many dimensions that drove growth between 2004 and 2015.

In September, Governor Jerry Brown (D-CA) signed AB 2480 into law. This bill established that “source watersheds are recognized and defined as integral components of California’s water infrastructure.” The conservation think tank Pacific Forest Trust created the bill together with its author, Assemblymember Richard Bloom (D-Santa Monica).

REDD+ forest conservation funding for developing nations has dropped precipitously over the last two years, according to a report from Overseas Development Institute and Heinrich Boll Stiftung, “10 Things to Know about Climate Finance in 2016.” But according to Mario Boccucci, head of the UN-REDD Programme Secretariat, “The current level of public-sector donor pledging to forest systems and REDD+ is unprecedented. Germany, United Kingdom, and Norway have pledged $5 billion USD for the period 2016 through 2020.” He said REDD+ is taking off now after a challenging few years of development.

District of Columbia Water and Sewer Authority (DC Water) has created an innovative municipal bond that covers the downside risk of using green infrastructure to control stormwater runoff. Compared with conventional gray infrastructure, green options have a shorter performance record and are more difficult to model. However, they are often cheaper and offer visible community benefits.

The San Francisco Public Utilities Commission issued the world’s first bond certified to the Water Climate Bond Standard last May. Market demand for third-party certified green bonds seems to be rising – and now, municipalities have a model. The $240-million bond will fund various wastewater and stormwater management projects in the commission’s Sewer System Improvement Program.

When the quality of land degrades, environmental, social and economic opportunities evaporate. The United Nations is working to prevent land degradation globally. In this interview, Simone Quatrini, Land Degradation Neutrality Fund coordinator and team leader at the Global Mechanism of the United Nations Convention to Combat Desertification, said his program is attempting a worldwide conservation finance effort. There is massive work to be done.

The current conservation finance gap is estimated to be $200-300 billion per year. As public and philanthropic investment in conservation are in decline, private investment has the potential to bridge it. That was the key message conveyed by the Coalition for Private Investment in Conservation launched at the International Union for Conservation of Nature 2016 World Conservation Congress on Sept. 2, in Honolulu, Hawaii.

This year’s World Water Week, which took place in Stockholm, Sweden from Aug. 28 through Sept. 2, focused on water as the central engine to set the planet on the path of sustainable growth and development.

Around the world, water shortages are affecting communities, businesses and ecosystems. More than half of the world’s cities and three-fourths of irrigated farms are experiencing water shortages on a recurring basis. Freshwater species are disappearing as their habitats are dried up by water extraction. Looking ahead, more frequent and severe droughts linked to climate change will only exacerbate these problems. But there's good news.