Technology from Envia that was supposed to cut EV battery costs in half doesn't actually work.
Sure, lithium-ion batteries have risks, but so do gasoline-powered cars.
A study suggests the EPA is greatly underestimating greenhouse-gas emissions from natural-gas production.
UPDATE: Early Data Suggests Collision-Caused Fires are More Frequent in the Tesla Model S than Conventional Cars
When you look at collision data, the Model S looks worse than conventional cars. But it may be too early to draw conclusions.
A more efficient engine and composite wings that fold up will reduce fuel consumption on Boeing's 777x.
EPA says it wants to lower the amount of ethanol oil companies are required to blend with their fuel.
Conventional batteries take so long to charge that they cannot efficiently store braking energy. Graphene supercapacitors store almost as much but charge in just 16 seconds.
As the solar industry matures, it better start worrying about dust, as SunPower is with its solar panel washer acquisition.
In a smart city, every electric vehicle must have access to a charging station within its driving range. So how should these stations be located? The good news: computer scientists have solved the general version of this problem. The bad news: it's NP-hard.
Musk says battery cell capacity will need to double worldwide for Tesla to produce a mass-market electric car.