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Researchers, Lawmakers Debate Carbon Markets
Agricultural emissions2 are getting more attention from U.S. officials, researchers, and industry professionals. One big area of debate is the link between carbon storage and carbon markets.
New Policies
Last week, the United States Department of Agriculture (USDA) announced a $300 million investment to monitor agricultural emissions. The investment will help create a research group to monitor carbon levels in soil.
American lawmakers also proposed a measure to support research needed to "properly credit soil carbon storage."
The USDA announcement and the law are both aimed at the difficult question of how to measure carbon stored in soil. The issue is important if the young soil carbon market is to avoid the opposition3 directed at current carbon credit markets.
Carbon storage
The Congressional Research Services describes a carbon market as an economic idea "that supports the buying and selling of environmental commodities that signify GHG (greenhouse gas) emission1 reductions" or storage.
The general idea is that some kinds of farming methods can support carbon storage. As a result, some farmers can get money in the form of carbon offsets5 — payments that companies can make that support carbon storage in farms.
Shalamar Armstrong is an associate professor at Purdue University in West Lafayette, Indiana. "The more carbon you store from the atmosphere with your crops, and the more crops grown throughout the year, you offset4 some of your waste," he said. The carbon that was stored would have instead been released into the atmosphere, he explained.
But much about carbon storage remains6 unknown.
"The science piece (of carbon credits) has really lagged behind, particularly when it comes to things like monitoring, reporting and verification," said Cristel Zoebisch, a policy director at climate organization Carbon180.
Armstrong has been trying to help fix the problem of measuring carbon storage. He runs a lab where researchers are investigating how farming method affects the amount of carbon in soil across different kinds of land. He and others at Purdue have been studying soil samples that date back more than 40 years.
He hopes his findings will help farmers make decisions that could result in earnings7 from storing carbon and without losing any crop profit.
Carbon markets
But other experts worry that even if farmers do get paid for storing soil carbon, bigger issues remain.
Carbon offsets in the U.S. have to meet four conditions. They have to store carbon that would otherwise be released. The offsets also have to be verifiable in data, immediate8 and long-lasting, said John Sterman, a professor at Massachusetts Institute of Technology.
Carbon storage research might make the offsets more verifiable, but such research does not deal with other problems.
For example, many American farmers do not own the land on which they grow crops. As a result, these farmers cannot guarantee that carbon stored on their land will stay in place if someone else works the same property.
Barbara Haya of the Berkeley Carbon Trading Project at University of California, Berkeley, says the research she has worked on shows that the effects of carbon offset projects are commonly overestimated9. Carbon trading has, in her words, "failed miserably10" over the last 20 years. She advises moving away from the process.
Jared Huffman, a lawmaker in the U.S. House of Representatives, last month proposed a bill to support farmers in making improvements to soil health. He said farmers in the area he represents would be interested in entering carbon markets with strong accounting11 systems. But he added that those hoping for serious climate action should not depend only on offsets.
Words in The Story
commodity – n. something that is bought and sold
signify – v. to be a sign of (something) : to mean (something)
lag– v. to be in a position that is behind others
verify – v. to prove, show, find out, or state that (something) is true or correct
1 emission | |
n.发出物,散发物;发出,散发 | |
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2 emissions | |
排放物( emission的名词复数 ); 散发物(尤指气体) | |
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3 opposition | |
n.反对,敌对 | |
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4 offset | |
n.分支,补偿;v.抵消,补偿 | |
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5 offsets | |
n.开端( offset的名词复数 );出发v.抵消( offset的第三人称单数 );补偿;(为了比较的目的而)把…并列(或并置);为(管道等)装支管 | |
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6 remains | |
n.剩余物,残留物;遗体,遗迹 | |
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7 earnings | |
n.工资收人;利润,利益,所得 | |
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8 immediate | |
adj.立即的;直接的,最接近的;紧靠的 | |
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9 overestimated | |
对(数量)估计过高,对…作过高的评价( overestimate的过去式和过去分词 ) | |
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10 miserably | |
adv.痛苦地;悲惨地;糟糕地;极度地 | |
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11 accounting | |
n.会计,会计学,借贷对照表 | |
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