- Ocean Carbon Sequestration
- Prairie Grasses for Carbon Sequestration
- Arguments for Caution When Using Trees for Carbon Sequestration (Mongabay.com)
"Overall, about 20 percent more of the water provided by precipitation was removed by current tree farming, the study estimated. And additional planting of trees for carbon mitigation will likely have large impacts on water resources of many nations that net less than 30 percent of what precipitation provides for their total annual supplies of fresh water, the authors predicted." 07-08
- Basics of Carbon Sequestration (EPA.gov)
"There are three general means by which agricultural and forestry practices can reduce greenhouse gases:"
"(1) avoiding emissions by maintaining existing carbon storage in trees and soils;"
"(2) increasing carbon storage by, e.g., tree planting, conversion from conventional to conservation tillage practices on agricultural lands;"
"(3) substituting bio-based fuels and products for fossil fuels, such as coal and oil, and energy-intensive products that generate greater quantities of CO2 when used."
"Forests and soils have a large influence on atmospheric levels of carbon dioxide (CO2)—the most important global warming gas emitted by human activities. Tropical deforestation is responsible for about 20% of the world's annual CO2 emissions (IPCC Special Report on LULUCF (2000)." 07-08
- Biochar Might Be That Magical (ABC News)
"A new study in Nature Communications finds that the world could, in theory, sustainably offset a whopping 12 percent of global greenhouse-gas emissions by producing biochar."
"So for the Nature Communications study, the researchers just looked at the world's supply of crop leftovers: corn leaves and stalks, rice husks, livestock manure, yard trimmings. If virtually all of that biomass was used to make biochar, we could conceivably offset 12 percent of global carbon emissions." 08-10
- Biomass: Beyond the Hype (BiomassMagazine.com)
"The hype surrounding biochar as a climate change mitigation tool, soil amendment or power source is mesmerizing with promises of miraculous results. Too much talk and not much action, however, has raised doubts about its potential." 09-10
- Carbon-Negative Biofuel (Mongabay.com)
"Imagine this. The year is 2015. An innovative automaker has teamed up with a novel type of energy company - a negative emissions producer. They make the amazing claim that by buying their efficient car and using their particular type of energy, you will be fighting climate change each time you drive the vehicle. You will not merely be 'reducing' your carbon emissions (which is old world language). Instead you will in fact be taking carbon emissions from the past out of the atmosphere. You will be cleaning up old gas guzzlers' emissions." 01-09
- Perennial Grasses and Cattle (Living on Earth)
"Drought-tolerant perennial pastures could make a big dent in Australia's greenhouse emissions by helping soils to soak up carbon, says one researcher."
He says results from a trial, which ran for more than three years on a farm in Lancelin, show Rhodes grass can capture and sequester nearly 7 tonnes per hectare of CO2 equivalents per year more than traditional pasture." 02-09
- Plant a Tree...the Right Kind (ABC News)
"Syracuse researchers found that if they could replant their city with trees that are great at sequestering carbon compounds, especially carbon dioxide, they could increase the removal of carbon by more than 300 percent. But they also found that air quality would actually suffer from an increase in volatile compounds."
"So they looked at mixing the forest, emphasizing trees that are good performers when it comes to carbon sequestration and don't emit a lot of junk. They came up with a list of 31 species, including American basswood, dogwood, Eastern white pine, Eastern red cedar, gray birch, red maple and river birch. That combination, they found, would increase carbon sequestration by 86 percent, and reduce the emission of volatile compounds by 88 percent." 12-06
- Soil Organic Matter Needed to Bring Down Atmospheric Carbon (Soil Carbon Coalition.org)
"In Allan Yeomans’s book Priority One: Together We Can Beat Global Warming (2005, 2007), he states that an additional 1.6% of the top 12 inches of the world’s cropland and grazing land soils turned into organic matter would bring atmospheric carbon dioxide concentrations below 300 ppm (if we also quit adding carbon to the atmosphere). This figure is based on removing 80 parts per million of atmospheric CO2." 06-08