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 last places you should focus your attention, in terms of having a meaningful impact. I run a separate blog called Social Panic, focusing on … Continue reading Climate: Eating vegetarian has little impact on your household carbon emissions
Tesla does not say how many times its batteries can be re-charged. Since the number of charge cycles is dependent on many variable factors, that is understandable for Tesla not to provide a number. They do provide an 8-year, 90% capacity guarantee option, however. Panasonic, which makes the batteries, citing laboratory tests (which may be … Continue reading Transportation: EV battery life
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 Norway’s new cars had a plug in 2019, Tesla Model 3 overall best-seller – Electrek This story does not mention Norway deeply subsidizes the purchase … Continue reading Transportation: 56% of Norway’s new cars are EV-based – but geesh, crappy journalism
Nikola, a start-up that has focused on hydrogen and battery-powered heavy-duty trucks, isn’t offering many details about the new technology and, considering that other promised breakthroughs have failed to prove production ready, there are plenty of skeptics. Even if it does pan out, tech consultancy ABI Research warns it would likely take several years, at … Continue reading Transportation: New battery promises for EVs
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 is a hybrid (like Prius), PHEV is a plug-in hybrid electric vehicle. This chart assumes the GHG emissions from electricity generation plants are in line … Continue reading Energy: Lifecycle GHG emissions from a hybrid, plug in hybrid and an EV are about the same
Few people have any idea about the lifetime energy usage of popular consumer products. 50-75% of the energy and green house gas emissions for many cars occurs during manufacturing. Switching to an EV (for which much of its lifetime energy/GHGs is during manufacturing) may have little benefit to the earth. When it comes to unplugging … Continue reading Energy: Unplugging your cell phone charger does nearly nothing for the environment
Should you buy an EV? Should you install solar PV? Details matter a lot as to whether your decision leads to actual environmental improvements – or not. Should you buy carbon offsets? A better solution is to invest in direct solutions, even helping your neighbors become efficient energy consumers, to buy or install solar PV or an EV, depending on where you live.
Among a decline in electricity sales in the United States, electric utilities “need a new source of load growth” and “electrification of the transportation sector” is a huge opportunity. To that end, they are pushing for more EVs, even though the effect on greenhouse gas reductions may be mixed for now (due to use of fossil fuel-based generation).
News reports imply that our cars are the largest contributor of greenhouse gases in the U.S. In fact, the “transportation” segment is the largest producer but this includes all transportation including business vehicles, medium trucks and semi-trucks, aircraft, ships at sea and more. Drilling down, a reasonable estimate is that our personal vehicles contribute about 13% to GHG output in the U.S.
Next Thursday at UW CSE or view remotely: http://www.cs.washington.edu/events/colloq_info UNIVERSITY OF WASHINGTON Computer Science and Engineering COLLOQUIUM SPEAKER: David Kotz, Dartmouth College TITLE: Amulet: An Energy-Efficient, Multi-Application Wearable Platform DATE: Thursday, December 1, 2016 TIME: 3:30pm PLACE: EEB-105 HOST: Tadayoshi Kohno ABSTRACT: Wearable technology enables a range … Continue reading University of Washington: upcoming Internet accessible lecture on #IoT #Wearables Technology