Tag Archives: Environment

الأقمشة الصناعية تلوِّث الأرض بألياف بلاستيكية

Credit: Justin Sullivan/Getty

Nature (2020) doi:10.1038/d41586-020-02632-7 English article   Credit: Justin Sullivan/Getty أنتجت الأقمشة الصناعية حوالي 5.6 مليون طن من الألياف الدقيقة منذ عام 1950، مسببةً تلوثًا لليابسة والماء على حد سواء فعند غسل الأنسجة الصناعية، مثل الصوف القطبي والنايلون، تتساقط منها أليافٌ بلاستيكية دقيقة. وقد كشفت أبحاث سابقة عن وجود هذه الألياف الدقيقة في العديد من الأنظمة الإيكولوجية المتنوعة، لكن هذه هي …

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لماذا تؤدي إزالة الغابات إلى زيادة احتمالية تفشِّي الأوبئة؟

يُكثِّف الباحثون جهودهم من أجل الوقوف على طبيعة العلاقة بين التنوع البيولوجي، والأمراض الناشئة، والبحث في كيفية الاستفادة من تلك المعلومات في التنبُّؤ بتفشِّي الأوبئة المستقبلية، وسبل منْع تفشي الأوبئة. جيف توليفسون Nature (2020) doi:10.1038/d41586-020-02341-1 English article يقول الخبراء إنَّ الحدّ من إزالة الغابات (موضَّحة في الصورة، الملتقَطة من غابةٍ مدارية مطيرة بحوض الكونغو) يمكن أن يقلل من احتمال ظهور جوائح …

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“وَشْمٌ” نباتيّ يعمل كجرس إنذار ضد مخاطر غاز الأوزون

Nature (2020) doi:10.1038/d41586-020-02593-x English article Credit: Getty ابتكر العلماء أقطابًا كهربية بحجم ظُفر الإصبع، إذا ما تمَّ تثبيتها (أو “وَشْمُها”) على أوراق الأشجار، تستطيع كشف ما يلحق بها من تلف غير مرئي بفعل تلوث الجو بغاز الأوزون الذي يتخلل ذرات الهواء في كل مكان، ويشكل خطرًا على المحاصيل الزراعية. إنَّ تعرُّض بعض محاصيل الفاكهة، ومنها العنب، لهواءٍ يبلغ تركيز الأوزون فيه …

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Steps Sudan must take to prevent future flood destruction

Sudanese people carry their belongings through the flood waters. Isam Al-Haj/AFP via Getty Images

<figure> <img src=”https://images.theconversation.com/files/357921/original/file-20200914-22-1592kvn.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=754&fit=clip” /> <figcaption> Sudanese people carry their belongings through the flood waters. <span class=”attribution”><span class=”source”> Isam Al-Haj/AFP via Getty Images</span></span> </figcaption> </figure> <span><a href=”https://theconversation.com/profiles/abdelrahim-salih-1156214″>Abdelrahim Salih</a>, <em><a href=”https://theconversation.com/institutions/imam-muhammad-ibn-saud-islamic-university-4858″>Imam Muhammad ibn Saud Islamic University</a></em></span> <p><em>In Sudan, record floods and heavy rains <a href=”https://www.aljazeera.com/news/2020/09/lost-thousands-homeless-sudan-battles-floods-200909102451318.html”>have so far</a> killed over one hundred people and displaced over 500,000. A committee tasked with dealing with …

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Malaria: new map shows which areas will be at risk because of global warming

mycteria / shutterstock

mycteria / shutterstock Mark Smith, University of Leeds and Chris Thomas, University of Lincoln Of an estimated 228 million cases of malaria worldwide each year, around 93% are in Africa. This proportion is more or less the same for the 405,000 malaria deaths globally. That’s why there are huge efforts underway to provide detailed maps of current malaria cases in …

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Video: Slowing deforestation is the key to preventing the next pandemic – but what does that cost?

Reducing deforestation of tropical forests and supporting the communities that live there can reduce the risk of future pandemics. AFP via Getty Images

Reducing deforestation of tropical forests and supporting the communities that live there can reduce the risk of future pandemics. AFP via Getty Images Les Kaufman, Boston University In a recent journal article, a team of biologists, medical scientists, environmental scientists and conservationists proposed a number of measures to reduce the likelihood of future pandemics, many of which originate with wild …

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Oil companies are thinking about a low-carbon future, but aren’t making big investments in it yet

Oil pump jacks in Williston, N.D. AP Photo/Eric Gay

Oil pump jacks in Williston, N.D. AP Photo/Eric Gay Lewis Fulton, University of California, Davis and Daniel Sperling, University of California, Davis The global oil industry stands at a crossroads. Corporate leaders are weighing how closely to stay wedded to their legacy business – finding, extracting and refining fossil energy – versus preparing for an uncertain low-carbon future. There are …

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KAUST Research: Corals pass on more than genes

KAUST Research: Corals pass on more than genes

Marine scientists at KAUST are studying the way corals respond to changing oceanic conditions. Findings show that corals can learn from their experiences, adapt, and then pass this information on to their offspring. These adaptations occur gradually over time. With ocean temperatures rising due to climate change, the scientists wondered: Could corals learn to adjust more quickly? By growing corals …

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Microplastics: tiny crustaceans can fragment them into even smaller nanoplastics

Gammarus duebeni, the shrimp-like animal that can break down microplastic. Alicia Mateos Cárdenas, Author provided

Gammarus duebeni, the shrimp-like animal that can break down microplastic. Alicia Mateos Cárdenas, Author provided Alicia Mateos Cárdenas, University College Cork Microplastics are widespread in seas and oceans, and their harmful effects on many different marine animals are well known. However, we know relatively little about the microplastics in our freshwater rivers, streams and lakes. We still don’t know exactly …

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