Today’s Solutions: September 21, 2026

Energy

Transitioning to a world powered by renewable energy is key to tackling climate change. Here you can find the latest good news related to our clean energy transition, covering wind, solar, green hydrogen, hydropower, and more.

Red tuk-tuk auto rickshaw with mesh passenger seat, two riders cruising down a sunny urban street.

In Cuba’s fuel crisis, solar tricycles took the streets

BY THE OPTIMIST DAILY EDITORIAL TEAM Cuba has long been known for its vintage cars — the American ones that kept rolling through decades of embargo and scarcity, repaired with ingenuity and improvised parts. That ingenuity hasn’t gone anywhere. What it’s being directed at now is something Read More...

Old metal kettle beside a stacked steam pot on a campfire in a sandy outdoor area.

Africa secures $900 million in new clean cooking commitments

BY THE OPTIMIST DAILY EDITORIAL TEAM Nearly one billion people across Africa cook over charcoal or firewood every day. $3.1 billion in commitments is what it’s going to take to change that, and the number keeps climbing. African countries secured $900 million in new financial commitments to Read More...

View of a sunlit Parisian riverfront with a stone embankment, ornate historic buildings, and a blue sky. Crowds are visible on the walkway and a bridge spans the river.

How Paris uses the Seine to cool thousands of buildings without AC

BY THE OPTIMIST DAILY EDITORIAL TEAM Every air conditioner does the same thing: pull heat from inside a building and dump it outside. On a hot day, millions of units doing that together push street temperatures up, which makes the next hot day worse. “Everything that requires energy releases Read More...

Green hydrogen energy site with large H2 storage tank, solar panels, and wind turbines under a blue sky

The bill that brings green hydrogen into California’s clean energy grid

BY THE OPTIMIST DAILY EDITORIAL TEAM California just closed a gap that’s been undermining its clean energy numbers for years. Governor Newsom signed SB 1350 into law, qualifying green hydrogen electricity as a renewable source under the state’s Renewables Portfolio Standard. Power plants Read More...

Aerial view of a large solar panel array over a canal, with farmland and a road nearby.

California canal solar project reduces evaporation and generates power

BY THE OPTIMIST DAILY EDITORIAL TEAM Shade from solar panels installed above two California irrigation canals reduced water evaporation by up to 70 percent and cut aquatic weed and algae growth by up to 85 percent over a full irrigation season, according to data from Project Nexus, a Read More...

Close-up of wet, dark brown soil with small clumps and granular texture.

Wet coffee waste becomes coal-grade fuel in under two minutes

BY THE OPTIMIST DAILY EDITORIAL TEAM Researchers at the Korea Institute of Geoscience and Mineral Resources developed a plasma-based process that converts wet coffee grounds into coal-grade biochar in under 90 seconds, with no pre-drying required. The system, described in Chemical Engineering Read More...

Close-up of green, pebbly-skinned avocados piled together in a heap.

Solar fridges lift African farmers’ incomes by 50 percent

BY THE OPTIMIST DAILY EDITORIAL TEAM Up to 40 percent of food produced in Africa is lost between harvest and market. Not from drought or pest damage, but from the absence of one thing: refrigeration. The early numbers from solar-powered cold storage are hard to argue with. Provider Soko Fresh Read More...

Row of white modular industrial containers with ventilation panels on a gravel lot, trees in the background against a clear blue sky.

California’s first eight-hour grid battery just came online

BY THE OPTIMIST DAILY EDITORIAL TEAM The California grid has a timing problem. Solar runs from mid-morning through early evening. Demand peaks later. Batteries have bridged part of that gap for years, but only about four hours’ worth. On June 1, a project in Kern County doubled that Read More...

Tall glass skyscraper rises among a dense downtown skyline under a clear blue sky, on a sunny day close to noon.

11,000 jobs, $1.4 billion in savings: what a decade of green banking built in Philadelphia

BY THE OPTIMIST DAILY EDITORIAL TEAM An impressive $14.7 million from the city. $1.3 billion in economic investment returned. $1.4 billion in energy savings. 11,000 jobs created. Those are the results of the Philadelphia Energy Campaign’s first decade, according to a 10-year economic impact Read More...

American flag and California state flag waving on a flagpole against a clear blue sky.

Monterey Park becomes first US city to permanently ban data centers

BY THE OPTIMIST DAILY EDITORIAL TEAM Monterey Park voted 86 percent to 14 percent last Tuesday to permanently ban data centers from the city. It is the first US city to do it through a ballot initiative. Campaign organizer Steven Kung called it “a landslide victory.” On the reasons: Read More...