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Generate an explanation for the given claim using the provided supporting material from the paragraph. Please consider the following points while generating an output. 1) The claim will always have supporting proof in the paragraph, and the paragraph will have a clear point of view supporting the claim. 2) There can be instances where direct correlation to the claim is not available. Make use of the sentences in the paragraph to provide a corresponding output supporting the claim. 3) The explanation should be at least one and at most twelve sentences long.
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Paragraph: A deadly fungal disease devastated amphibians in Central America more than a decade ago, quieting some mountain streams. But new research shows evolution may have saved the day and the frogs. In El Cope, Panama, at least four species disappeared including the red-striped Rio San Juan robber frog. Four other species lost at least 88 percent of their population from a disease-causing fungus that hit Panama hard from 2004 to 2007. The fungus has also been blamed for wiping out amphibian populations in California's Sierra Nevada and parts of Australia. In the last few years, croaks have been heard in once quiet Panama streams. The critters are by no means recovered since they are still infected with the fungus, but they are alive and growing in numbers, according to a new study in Thursday's journal Science . "It's so easy to lose hope when you've walked the same stretch of stream year after year, hoping to see a hint of the amazing diversity you once saw there," study co-author Corinne Richards-Zawacki, a University of Pittsburgh biologist, said in an email. "So you can imagine how good it feels to be able to report some good news from the field." The recovery is not everywhere and it's at best modest, cautioned lead author Jamie Voyles, a disease ecologist at the University of Nevada, Reno. One of the frogs making the most noticeable comeback is the hard-to-catch rocket frog, named because it is so quick, she said. Voyles and Richards-Zawacki wanted to find out why the amphibians survived. They initially figured the disease weakened. But after testing old and new disease samples on frogs, they found the disease was as dangerous as ever. To their surprise, the frogs and toads were fighting back better. The fungal disease attacks their skin secretions and recently the frogs showed a two- to five-fold improvement in the amphibians' ability to limit the fungus' growth. The disease is still there, but it does less damage, Voyles said. While this research is important, the findings aren't too surprising because past studies have shown that as bad as disease outbreaks get, they play a tiny role in species extinction, said Andrew Blaustein at Oregon State University, who wasn't part of the study. Evolution allows species to resist completely succumbing to the nastiest diseases. "So, yes there is hope," Blaustein said in an email. ___ Follow Seth Borenstein on Twitter at @borenbears . His work can be found here . ___ The Associated Press Health & Science Department receives support from the Howard Hughes Medical Institute's Department of Science Education. The AP is solely responsible for all content. Claim: A ribbit of hope: Panama frogs hop back after nasty disease.
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After years of silence, the rhythmic dee-dee-deeps of frogs and toads are returning in parts of Panama.

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Paragraph: Plastic mulch, basically thin sheeting placed over individual crops, is used throughout China's arid and dusty north to improve growing conditions and boost yields by retaining moisture for crops and suppressing weeds. The country deploys about 200,000 square km (77,220 square miles) of plastic mulch, an area the size of Belarus. A notice published by several ministries on Wednesday said China would work to improve the recovery rate of plastic mulch to 80% next year and ensure there is "zero growth" in the amount of plastic mulch used. It will aim to bring recovery rates to 100% and start reducing total land coverage by 2025. The notice said China would also work to improve its monitoring capability and include mulch pollution in the performance indicators of local government officials. Manufacturers will also be put under pressure to improve product standards. China uses about 2 million to 3 million tonnes of plastic mulch every year, but waste treatment capacity amounts to just 180,000 tonnes, Yan Changrong, a researcher with the China Rural Science Institute, said at a recent forum. While the use of plastic film can boost yields significantly in the short term, unrecovered remnants eventually degrade the soil and can also contaminate crops, with Chinese exports of spinach and ginger found to contain traces of plastic, said Xu Jingeng, a parliamentary delegate for Shandong province, in a proposal submitted to the National People's Congress in March. Handling large volumes of plastic waste has become one of China's pressing challenges. The country's recycling capacity stands at around 23 million to 25 million tonnes, only half of total annual plastic waste produced, according to data from the Beijing Chemistry University. The city of Shanghai is gradually restricting the use of single-use plastics in catering, and the island province of Hainan has already vowed to completely eliminate single-use plastic by 2025. [nL4N23Y1YE][nL3N20G7K1] Claim: China vows to raise recycling rates of rural plastic mulch.
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China vowed to improve the recycling rates of plastic mulch used in farming, the government said on Wednesday, amid mounting concerns about soil contamination as unrecovered bits of the thin film get left behind, leaving traces in crops.

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Paragraph: Since the vaccine is not available, a discussion of costs is not warranted. The piece does a nice job of presenting the results of the initial report in terms of absolute and relative risk reduction; however, absolute data is not provided for the secondary analyses. To its credit, the story clearly and effectively explained statistical significance as it relates to this research. As stated in previous coverage, the story reiterates that the benefits of the vaccine are modest and additional research is needed. Given that this is a follow-up report focused on newly released data, a discussion of the potential harms of the vaccine is not necessary. This story does an excellent job defining the different types of analyses used to evaluate the outcome data. The story also points out the results of the secondary analyses have been published in a peer-reviewed journal, suggesting the calculations have been checked for accuracy. This story does not engage in disease-mongering. This story does not provide commentary from any independent sources. In this case, a single comment from a biostatistical consultant would have provided helpful perspective. Given the nature of this follow-up story, a discussion on the existing alternatives to HIV prevention may not be warranted. This story makes it known that the vaccine is still in the testing phase and is not yet available. The story makes it clear that researchers have been working on an AIDS vaccine for decades. The story does not appear to be based on a press release. Claim: AIDS Vaccine Is of Modest Help, Fuller Research Says
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This follow-up piece draws attention to secondary data analyses of the much talked about AIDS vaccination trial conducted in Thailand. According to the results released in September, the vaccine showed a statistically significant reduction in risk of HIV infection. However, two additional analyses published recently in the New England Journal of Medicine did not find statistical significance. This story underscores the need for healthy skepticism about early announcements of unpublished research. The writer did a nice job explaining different types of analysis and statistical significance, which many physicians and lay people have difficulty grasping.