Real Climate Solutions Are Beneath Us

By -
By Peter Reiners, Eos/AGU. 

Excerpt: ...humanity’s first priority should be to drastically reduce its annual emissions of roughly 40 gigatons...of carbon dioxide (CO2), the greenhouse gas most responsible for driving warming. Without this reduction, other measures will be only modestly effective at best. But...the scale of mitigation needed to keep warming to below 2°C–3°C goes beyond reducing annual emissions. We must also remove and store carbon that has accumulated in the atmosphere. ...The biggest opportunity...for geoscientists to contribute to mitigation is through facilitating durable carbon dioxide removal (CDR). Concerns are sometimes raised about CDR as a form of climate intervention, or geoengineering, yet it is far less risky than the centuries-long geoengineering experiment of using the atmosphere as a sewer. ...Many approaches to CDR exist. Direct air capture (DAC)...in which CO2 is pulled straight from the atmosphere. Biomass carbon removal and storage (BiCRS) methods capture a fraction of the 480 gigatons of CO2 that plants naturally absorb each year and prevent it from cycling back to the atmosphere by converting biomass to forms that can be isolated and stored. ...managing ecosystems to stimulate more CO2 removal than would occur naturally.... ...various strategies for enhanced rock weathering in croplands or forests and for marine CDR, such as using nutrients to promote biomass growth and raising the alkalinity of seawater so it pulls more CO2 from the air. ...Third, and most important, is the fact that however CO2 is removed, it must be stored durably, with minimal likelihood it can return to the atmosphere for a long time.... 

Popular posts from this blog

2024 was the hottest year on record, breaching a critical climate goal and capping 10 years of unprecedented heat

By -
By Laura Paddison , CNN.  Excerpt: It’s official: 2024 was the hottest year on record, breaking the  previous record  set in 2023 and pushing the world over a critical climate threshold, according to new data from Europe’s climate monitoring agency Copernicus [ https://climate.copernicus.eu/copernicus-2024-first-year-exceed-15degc-above-pre-industrial-level ]. Last year was 1.6 degrees hotter than the period before humans began burning large amounts of fossil fuels, Copernicus found. It makes 2024 the first calendar year to breach  the 1.5-degree limit  countries agreed to avoid under the Paris climate agreement in 2015. Scientists are much more concerned about breaches over decades, rather than single years — as above that threshold humans and ecosystems may struggle to adapt — but 2024’s   record   “does mean we’re getting dangerously close,” said Joeri Rogelj, a climate professor at Imperial College London....  Full article at https://www.cnn.c...
Read more

Where Glaciers Melt, the Rivers Run Red

By -
By Mitra Taj , The New York Times.  Excerpt: As the glaciers of South America retreat, the supply of freshwater is dwindling and its quality is getting worse. Dionisia Moreno, a 70-year-old Indigenous farmer, still remembers when Shallap River, nearly 13,000 feet up in the Cordillera Blanca, brought crystal clear water brimming with trout to her village, Jancu. “People and animals alike could drink the water without suffering,” she said. “Now the water is red. No one can drink it.”....  Full article at https://www.nytimes.com/2024/11/19/science/peru-glaciers-water-pollution.html . 
Read more

How will China impact the future of climate change? You might be surprised

By -
By Julia Simon , NPR.  Excerpt: The U.S. is preparing for a second presidential term for Donald Trump, who has called climate change a hoax and federal investments in climate solutions a " green new scam “. In China, it’s a different story. China has made it clear it plans to be at the forefront of manufacturing climate solutions–and selling them around the globe. China is the world’s largest producer of renewable energy, now constructing almost  two thirds of all large-scale wind and solar power , according to nonprofit Global Energy Monitor. And China is spreading climate solution technologies across the developing world. Walk into an electric vehicle showroom in Colombia, the Dominican Republic, or Kenya these days, and the car on offer is likely made in China. “They’ve set up a situation where it’s good for them to sell clean energy technologies to the world,” says  Alex Wang , a professor of law at UCLA focused on Chinese climate policy. “It’s very good economically,...
Read more