Experts urged to ratify Minamata Convention to phase out mercury-added products পারদযুক্ত পণ্যের ব্যবহার বন্ধে মিনামাতা কনভেনশন অনুমোদনের আহ্বান সেন্টমার্টিন সৈকতে প্লাস্টিকের আগ্রাসন 72 birds die eating pesticide-treated masakalai Educate girls to save the planet শিশুর সর্দি-কাশি সারানোর ঘরোয়া উপায় 50 Books All Kids Should Read Before They’re 12 24 thousand under 5 children die of pneumonia in Bangladesh annually গ্রিনহাউস গ্যাস কমানোর লক্ষ্যে নানা উদ্যোগ Maldives: Eco-friendly product export destination for Bangladesh

Climate change: Warning from ‘Antarctica’s last forests’


Scramble across exposed rocks in the middle of Antarctica and it's possible to find the mummified twigs of shrubs that grew on the continent some three to five million years ago. This plant material isn't much to look at, but scientists say it should serve as a warning to the world about where climate change could take us if carbon emissions go unchecked. The time period is an epoch geologists call the Pliocene, 2.6-5.3 million years ago. It was marked by temperatures that were significantly warmer than today, perhaps by 2-3 degrees globally.

These were conditions that permitted plant growth even in the middle of the White Continent.

Higher, too, were sea-levels. It's uncertain by how much, but possibly in the region of 10-20m above the modern ocean surface. What's really significant, though, is that the amount of carbon dioxide in the atmosphere was very similar to what it is today – at around 400 CO2 molecules for every million molecules of air.

Indeed, the Pliocene was the last time in Earth history that the air carried this same concentration of the greenhouse gas. And it tells you where we're heading if we don't get serious about addressing the climate problem, cautions Prof Martin Siegert from the Grantham Institute at Imperial College London.

For More: https://www.bbc.com/news/science-environment-47806440?intlink_from_url=https://www.bbc.com/news/topics/cmj34zmwm1zt/climate-change&link_location=live-reporting-story

Posted by on Apr 6 2019. Filed under Climate change. You can follow any responses to this entry through the RSS 2.0. You can leave a response or trackback to this entry

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