How water could fix utility energy storage woes

High-tech batteries may be garnering the headlines, but utilities from Spain to China are relying on pumped storage hydroelectricity to overcome intermittent wind and solar. Read More

David Crane's farewell letter to NRG employees

The visionary CEO, passionate as ever about a clean-energy future, bids adieu. Read More

20 for '30: Imagining sustainability in 2030

What lies ahead! From Building Robotics and El Paso to Google and NASA, thought leaders look ahead. Read More

Congress extends the renewable investment tax credit: What now

The extension of the Production Tax Credit and Investment Tax Credit could mean a 56 percent boost to the renewable energy industry over five years. Read More

The business benefits of the climate fight

Climate change impacts won't leave any industries untouched, and many firms are profiting from building resilience into their business models. Read More

Two futurists on life in a climate-constrained world

How might global temperature rise, geoengineering and low-carbon transportation affect society — and the economy — as we know it? Read More

SunPower, SolarWorld top 2015 solar scorecard

Yet many solar companies continue to avoid transparency, threatening the long-term viability of the industry, warns the Silicon Valley Toxics Coalition. Read More

Here's why Paris is not another Copenhagen

Despite climate talk fiascos of the past, it's really different this time. Buckle up for a transformative agreement. Read More

Ikea, Sony commit with 112 others to science-based climate goals

A slew of multinationals pledged Tuesday at COP21 to link emissions goals formally to climate science. Read More

A who's who among the COP21 commitments

Is this the world's last chance to save the planet? More businesses are onboard than ever. Here's a guide to the names behind the names. Read More