LONDON , England ( CNN ) -- CNN International 's Going Green is back for another special series of in-depth reports , this time looking into the world 's green pioneers . From groundbreaking ideas in conservation , to the latest water sanitization systems that are impacting the world while advancing the green movement , this next edition focuses on innovative ways to tackle today 's environmental challenges . Anchored by CNN 's New Delhi-based correspondent Sara Sidner , `` Going Green -- Eco Pioneers '' visits Rajendra Singh , also known in India as the `` Rainman of Rajasthan , '' who is on a self-imposed mission to improve access to water in one of India 's driest states . Watch the 'Rainman ' of Rajasthan » . CNN 's Michael Holmes tells how Australian Geoff Lawton is working to spread his knowledge about Permaculture , which he says can turn arid land into fertile food-growing territory . Watch Lawton 's oasis in the desert » . In Argentinean Patagonia , CNN 's Brian Byrnes speaks with Douglas Tompkins , the environmentalist and founder of The North Face clothing company . He is the biggest private land owner in Chile and is advancing conservation initiatives in the southern tip of the South American continent . CNN 's Brian Byrnes reports from Argentina » . And reporting from Texas , CNN correspondent Ed Lavandera takes viewers on a tour of the laboratories of Pliny Fisk , an American engineer who is paving the way for more environmentally friendly structures .
Eco Pioneers is back with new special on CNN International 's Going Green . See `` Going Green -- Eco Pioneers '' for stories , tune into television special from today . Half-hour special profiles four environmental pioneers on four continents .