A new study explores how the U.S. power sector evolved on a much lower carbon path than analysts were projecting about 15 years ago.

Why it matters: The Lawrence Berkeley National Laboratory report is a reminder about the limits of our ability to look into the energy future. But it also shows that while energy transitions are generally slow, that's not some ironclad law of nature.

Yes, special climate envoy John Kerry's really in China and no, don't look for a huge breakthrough between the world's two largest carbon-emitting nations.

Driving the news: The State Department yesterday announced Kerry's visit this week, confirming plans that began emerging Saturday.

There are "chronic water shortages" in St. Vincent and the Grenadines as La Soufrière volcano continues to explode, government spokesperson Sehon Marshall told a local radio station Tuesday.

The big picture: Up to 20,000 people have been evacuated from the Caribbean island's northern region since the volcano began erupting there last Friday, per AP. Over 3,000 evacuees are staying in more than 80 government shelters.

Florida Gov. Ron DeSantis (R) said Tuesday he directed the state's Department of Environmental Protection to develop a plan to permanently close the wastewater reservoir at Piney Point phosphate plant that recently threatened to cause a catastrophic environmental disaster, according to AP.

Why it matters: The governor said that $15.4 million in agency funds will be used to treat the water, which contains waste from the phosphate production that can cause algae blooms and fish kills and eventually impact the food chain if introduced into the environment in large amounts.

John Kerry, President Biden's special envoy on climate change, is traveling to Shanghai, China and then on to South Korea for meetings on reducing emissions of planet-warming greenhouse gases, the State Department said.

Why it matters: Kerry is the highest-ranking U.S. official to visit China since Biden took office, and these talks come less than two weeks in advance of a virtual White House climate summit on April 22-23.

Energy Secretary Jennifer Granholm said the use of the filibuster-proof budget reconciliation process is an option for trying to pass a mandate that would greatly escalate zero-carbon power generation.

Why it matters: One of President Biden's most aggressive targets is achieving 100% carbon-free electricity generation by 2035, and a "clean electricity standard" could be a key tool to get there.

Asset management giants BlackRock and Temasek have created a new investment entity to stake companies capable of scaling up the deployment of climate-friendly technologies.

Why it matters: Decarbonization Partners is the latest sign of how finance giants — under pressure from activists but also seeing a big market — are steering more capital into clean energy tech and companies.

Private equity investments in U.S. renewables hit a record $23.7 billion last year, per a new report on deals from American Investment Council, which is the industry's lobbying and advocacy arm.

Where it stands: "PE invests in renewable energy in two major ways: buying and expanding established power generators and increasing their production over the long term, and financing development costs for new renewable power companies," it states.

A new Houston-based VC firm called Energy Transition Ventures emerged from stealth mode Tuesday and plans to reach $75 million for its first fund.

Why it matters: It's another sign of how Texas, the nation's largest oil producing state, is increasingly becoming a hub for clean energy innovation.

In the run-up to the White House's virtual climate summit on April 22-23, environmental groups and now major corporations are presenting a united front in calling for at least a 50% cut in U.S. greenhouse gas emissions by 2030, when compared to 2005 levels.

Why it matters: The 2030 targets are needed since the world is on course to sail above the warming targets set in place by the Paris Climate Agreement, resulting in potentially catastrophic climate impacts. These include the loss of much of the world's coral reefs and melting of some of the planet's largest ice sheets.

Japan's government on Tuesday announced plans to release more than 1 million metric tons of contaminated water from the destroyed Fukushima nuclear plant into the Pacific Ocean following a treatment process.

Why it matters: While the Biden administration has said Japan appears to have met globally accepted nuclear safety standards, officials in South Korea, China and Taiwan, local residents, those in the fishing industry and green groups oppose the plans, due to begin in about two years, per the Guardian.