As groups push for the subject to be discussed during the presidential debates, California passes laws on how to spend the billions in revenue from its cap-and-trade program.
The program is instrumental in creating 12,000 green jobs every quarter since April 2009.
The Federal Trade Commission updated its Green Guidelines, which aim to prevent deceptive advertising about the "greenness" of products.
Major new rankings identify promising companies in energy efficiency, water management and range of other green technologies.
New solar factories open in the US, Thailand opens its biggest; S. Korea opens it first big wind farm in the US; Obama decides Chinese firm can't buy four US wind farms, and more.
NY is beginning a second review process of fracking, as industry lobbying rises to record levels.
126 cities launched CaliforniaFIRST, which makes PACE loans available for businesses to inexpensively do energy, water and renewable energy upgrades.
NYC is the first to mandate biodiesel, and California's new laws include a home-grown biogas industry.
The show of financial support is meant to help restore investor confidence.
Prototype homes from 20 university teams share the goal of minimizing the use of natural resources.
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