A professor argues that it's possible to put a break on climate change by injecting sulfates above the stratosphere.
After being sidelined over unauthorized collection of people's Wi-Fi data, Street View cars hit the road again in some countries, but will no longer collect any such data.
Also: Japan to bring back solar subsidies; boat race in the Netherlands; more bad news for ethanol makers; solar textiles; call for geo-engineering research.
A geo-engineering technology called ocean seeding is gaining interest from green tech entrepreneurs but criticism from some environmental groups.
Can stimulating plankton growth slow climate change? A crew from a company called Planktos is setting sail to find out. Image: Plankton bloom