Electric Vehicle Efficiency
According to the U.S. government: Energy efficient. EVs convert over 77% of the electrical energy from the grid to power at the wheels. Conventional gasoline vehicles only convert about 12%–30%…
Transportation: NTSB critical of automatic driving systems
Seems like they must require a “keep alive” (dead man’s switch) to ensure driver’s remain alert. Among other things, the office wants Tesla to improve its driver engagement monitoring systems.…
Transportation: How EVs are more efficient than ICE vehicles – power on demand and regeneration
ICE vehicle engines, except in hybrids and PHEVs, run all the time. In an EV, you only consume power when you need power. This makes an EV ideal for city…
Transportation: One-third of cars sold in U.S. no longer carry a spare tire
One third of new cars sold in the U.S. no longer come with a spare tire vut instead include a temporary repair kit that only works on certain kinds of…
Climate: Eating vegetarian has little impact on your household carbon emissions
In spite of popular claims that eating vegetarian offers a dramatic reduction on your personal carbon emissions, the actual reduction is about 2%. Which means it is one of the…
Transportation: How Safe is Bicycling? No one actually knows
It’s not that there is a lack of data. Instead, it is that the data are inadequate to answer the questions. No one has good statistics, for example, on crashes…
Transportation: 56% of Norway’s new cars are EV-based – but geesh, crappy journalism
42% of Norway’s car sales were pure battery electric, and almost 14% were plug-in hybrid. Tesla Model 3 was the best-selling car, with 11% of the market. Source: 56% of…
Transportation: Vehicle miles driven per capita are dropping
“For decades, the country’s driving pattern moved in sync with the economy. Now, we’re driving less even though the economy has been expanding for more than a decade.” Source: America’s…
Energy: Lifecycle GHG emissions from a hybrid, plug in hybrid and an EV are about the same
This graphic, from the International Energy Agency, illustrates the lifetime CO2 equivalent emissions from different types of vehicles. “BEV” is a battery electric vehicle with a 400 km range, HEV…
Energy: In many countries, hybrid gas/EVs emit lower emissions than pure electric vehicles
An average battery electric and plug-in hybrid electric cars using electricity characterised by the current global average carbon intensity (518 grammes of carbon-dioxide equivalent per kilowatt-hour ) emit less GHGs…