Beauty of nature. A nice example of freshwater ecosystem with crystal pure water is Lake Baikal, video: the beautiful video is included in this file online: see the video: http://5bio5.blogspot.com/2017/01/improved-format-attention-interest-of.html

Beauty of nature.
A nice example of freshwater ecosystem with crystal pure water is Lake Baikal,
http://5bio5.blogspot.ru/2017/01/beauty-of-nature-nice-example-of.html

video:   the beautiful video is included in this file online:
see the video:
http://5bio5.blogspot.com/2017/01/improved-format-attention-interest-of.html