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But the fact is that the blockchain is building some serious credibility within the world's biggest banks and financial services firms - they helped fuel more than $1 billion in investments between 2014 and 2016. That visibility has given both established and emerging companies the confidence to experiment. In mid-October, for example, Walmart announced a collaboration with IBM and Tsinghua University in Beijing focused on using the blockchain as a mechanism for authenticating food sources and keeping tabs on all sorts of related data - including the originating farm, batch numbers, processing plant information, expiration dates and storage temperatures.

IBM recycled, reused or resold almost 97 percent of the end-of-life products it collected for processing last year, according to the tech giant's 25th annual corporate sustainability report.

AT&T and IBM - along with Mueller Water Products, a large maker of pipes, valves and fire hydrants - are working together to try to put more information in water managers' hands. The companies have put together a new service to hook up all those pipes to the internet.

Scientists from IBM Research say they have accidentally discovered a new class of polymer materials that could deliver cheaper, lighter, stronger and recyclable materials ideal for electronics, aerospace, airline and automotive industries.

If the 5,589 largest publicly traded companies in the US reduced their paper waste by a mere 1 percent, it would save them nearly $1 billion in total, according to the US Chamber of Commerce Foundation.

New innovations from the tech giants will allow businesses to make their cloud computing more environmentally sound.