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

Waterfalls are threatened highly


More than 100 years ago today, a 63-year-old Michigan schoolteacher took the first ride ever down Niagara Falls in a barrel. Annie Edson Taylor may have survived, but the future will tell if the waterfalls available for such (now-illegal) escapades will. Here are a few threats to waterfalls we can’t ignore if we want to preserve these natural wonders.

1. Drought

Last year, Yosemite Falls went dry for five months. While the falls have always been ephemeral, meaning they flow seasonally, California’s severe drought had stopped them two months earlier than usual in June until December rains started them again a month late. In The Atlantic, outdoorsman and author Michael Lanza wondered if the world’s sixth-highest falls would actually disappear, with climate change leading to less and less snowfall. Snowpack in the Cascade Range has already decreased 15 to 30 percent in the past 70 years.

“In the words of Yosemite National Park hydrologist Jim Roche: ‘Snow is…an endangered resource,’” Lanza writes. “Climate models offer different prognoses for the future of snow, depending largely on what steps society takes in coming years to reduce carbon dioxide emissions. Unfortunately, humanity has steadily emitted more CO2 than even the worst-case scenarios in forecasts from the Intergovernmental Panel on Climate Change (IPCC), the Nobel Peace Prize-winning United Nations body of more than two thousand scientists researching climate change.”

2. Dams

Although renewable hydroelectric power does important work in cutting the demand for fossil fuels, the technique sadly threatens our world’s waterfalls. For instance, Iceland gets 75 percent of its electricity from hydropower—at a cost to the pristine landscape. Excessive dam building has stopped or slowed to a trickle almost half of the waterfalls in the country since 2003, says artist Ruri, and much of the power generated goes toward multinational aluminum companies. She created Endangered Waters, an exhibit of 52 photographs of Iceland’s waterfalls alongside their sounds, to preserve their memory.

Source

http://www.enn.com/pollution/article/49104

Posted by on Oct 26 2015. Filed under News at Now. 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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