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Wal-Mart has introduced a line of "all-natural," chemical-free cleaning products under its Great Value label. The products, which are priced more cheaply than brand-name eco-friendly cleaning products, use Wal-Mart's proprietary Evolve technology, which the company says allows the products to work as effectively as petroleum-based cleaners.

The Building Energy Exchange, a nonprofit to advance energy efficient technologies and lighting strategies in industry, opened in New York City's downtown Manhattan. The nonprofit serves as a hub for information and activities for building owners seeking energy savings.

As a society, we are a long way from having an information technology industry that is anywhere near a closed-loop system, but Dell has been among the companies at the forefront of this movement.

How do we scale up information and communication tech among consumers? Focus on direct benefits to consumers as opposed to saving the world.

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.