Steaming ahead: Are community boilers the answer?

Hywind Scotland is the world's first commercial wind farm using floating wind turbines to generate power for about 36,000 homes a year. This approach — which is being seriously looked at by several countries seeking to reduce their carbon emissions and oil-and-gas companies wanting to expand into renewable energy — allows wind farms to work in deeper waters where there is often stronger winds.

Boston Metal is transforming how steel is made by replacing coal with electrons. Instead of using the fossil fuel in furnaces to melt iron ores, the Massachusetts-based company uses electric currents to heat the ore, which doesn’t create any greenhouse gas emissions. So far, the company has made only several tons of steel, but it recently received investor funding to expand its work.

An economic shift to renewable energy could take decades, but thanks to rapidly evolving disruptive technologies, dropping prices of solar and wind power sources, and increasing market demand for green business, the new age of renewable energy could encompass the world economy much more quickly.

It's been proven within the cookstove industry that providing free cleaner-energy stoves to those cooking with traditional stoves or over open flame does not work as planned. Inyenyeri, a Rwandan cookstove company however, is adding a twist to that method by giving away their cookstoves that reduce emissions by 98 to 99 percent compared to wood or charcoal stoves for free, as long as the consumer agrees to buying their wood fuel pellets.

With the help of federal tax credits and localized policies for building, last year, Florida surpassed California as the state with the most new solar panels plugged into its grid, building three gigawatts of large-scale solar in 2024.

Batteries that can be fully charged in five minutes have been created for the first time, allowing electric cars to recharge faster. The Israeli company StoreDot produced 1,000 of these new lithium-ion batteries, which can be recharged for 1,000 cycles while retaining 80 percent of the original capacity. It could be a few years before they are mass produced, but the CEO of the company says that this feat “demonstrates it is feasible and it’s commercially ready.”

As a way to reduce the amount of diesel fuel that powers trains, governments and transit companies around the world are turning to solar panels as a way to utilize renewable energy. In Australia, a solar train launched in 2017 that uses lithium-ion batteries that are charged by solar panels on the roof of the carriages. And a rail line in the United Kingdom uses energy from a solar farm to keep the train running. Scaling solar panels for nation-wide transit systems can be challenging, but many countries are committed to eliminating the use of fossil fuels on their rail networks.

Climeworks is focusing on pulling carbon dioxide directly out of the air to store or reuse in some capacity as a way to lower global greenhouse gas emissions. The Swiss company has 16 plants around Europe, with their biggest one in Switzerland that removes 900 tons of carbon dioxide a year that is then sold to Coca-Cola Co. to put in soft drinks or to local industrial greenhouses for plant growth. Scaling the operations to capture more carbon is costly, but the startup recently raised $76 million from investors.

Enrolling administrators and financial planners in sustainable projects takes proving that investments pay for themselves. With the help of pressure from students and faculty, Penn State Universities administrators have adopted a long-term strategy to reduce the university’s carbon footprint and implement sustainable practices. Students produced the data that illuminated the university’s unsustainable practices; the numbers now show that their efforts are paying off.

Three major US companies are leading the way in developing the technology to extract carbon dioxide from the air: Global Thermostat, Carbon Engineering, and Climeworks. With federal tax credits per ton of carbon dioxide captured and a prosperous system of injecting the CO2 back into the ground to stimulate crop yield, the companies' three different approaches all offer a way to cut into the massive amount of global emissions, an opportunity to make a lot of money with new technology, and a helping hand for states working on achieving new federal guidelines and restrictions for a green future.