Bringing the chill of the cosmos to a warming planet

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.

Boston University is getting all of its electricity from a wind farm in South Dakota, which should cover its annual energy needs of 205 million kilowatt-hours. Some energy advocates say the higher education institution should have purchased their renewable energy locally, but the university says their main goal was to maximize its reduction in greenhouse gas emissions. They hope to share their model with other “large energy buyers” and use the wind farm as an educational and research opportunity for students.

In Paris, about 7,500 buildings are heated using geothermal energy, a cost-saving and carbon neutral energy source. Water is drawn from deep below ground at a central location and heated by the earth, and then sent via underground pipes to individual buildings. The Bagneux and Chatillon district has scaled up the system, providing heat to over 40,000 people. Districts created joint ventures to reduce construction costs and residents do not notice the energy source shift because when the temperature drops to a point where geothermal energy is not viable, gas boilers automatically keeps the heat flowing.

Iceland, hit by the oil crises of the 1970s, turned to geothermal energy - and they haven't turned back. The island is now powered by 100% renewable energy, and they are taking it one step more, looking to further cut emissions using a unique carbon capture system called CarbFix. It is being pioneered at the Hellsheidi geothermal power plant in western Iceland.

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.

Canopy works to preserve the untouched Broadback Forest, which stores twice as much carbon as the Amazon and is central to the Cree Nation. The nonprofit works with 750 corporations, including fashion brands, commercial printers, and publishers to reduce the amount of packaging they use and eliminate sourcing from biodiverse, ancient, and endangered forests. They help source waste from grain and other food harvests for packaging, paper, and fabric production and enlist companies’ support of conservation initiatives. They also partner with other groups to lobby the government to protect the Broadback forest.

Terrapin Beer Co. is powering their brewery with solar power, approximately 30 percent of the business’ total energy. The brewery partnered with Cherry Street Energy, a third-party solar ownership company, which allows them to rent the solar panels for little upfront cost. However, this arrangement doesn’t allow the brewery to store solar power for future use. These efforts allow the business to rely more on renewable energy to reduce their carbon footprint.

The town of Athens, Georgia has committed to a 100% renewable energy pledge. Both the local government and local businesses are working towards it by implementing sustainable practices such as solar panels and wastewater pretreatment systems.

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.

Hydrogen fuel has made promising strides from Germany to Japan, thanks to shifting markets for renewables, improved storage technologies, and emissions-reduction goals. Electrolysis that uses renewables to make the fuel could transform transportation and energy infrastructure, but a few concerns about the unintended effects persist.