The consequences of global warming could be twice as bad as previously suggested, according to a new report published last week in the Proceedings of the National Academy of Sciences. Using new mathematical prediction models, the report said global oceans could rise by about six feet by the year 2100, about double previous estimates. The new... Sea level rise by 2100 could be double previous estimates, scientists predict
The consequences of global warming could be twice as bad as previously suggested, according to a new report published last week in the Proceedings of the National Academy of Sciences. Using new mathematical prediction models, the report said global oceans could rise by about six feet by the year 2100, about double previous estimates. The new... 
The past couple of weeks have seen the convergence of two troubling trends. Perhaps most troubling, the Scripps Institute of Oceanography released data last week from the National Oceanic and Atmospheric Administration that concentrations of carbon in the atmosphere have reached record levels unseen not just in human history, but in the scientific... 
![Exhaust emissions from tailpipe [photo: Simone Ramella, 2005, used under Creative Commons 2.0]](https://images.hgmsites.net/tmb/exhaust-emissions-from-tailpipe-photo-simone-ramella-2005-used-under-creative-commons-2-0_100644014_t.gif)
Every year, as Earth Day rolls around, we survey the automotive landscape looking for progress in the industry's efforts to reduce emissions and limit global warming. We've identified a lot of progress recently. More than a dozen new electric models are set to go on sale in the coming year, and sales of plug-in models more than doubled in the past... 
![Polar Bear on Arctic sea ice [Credit: AWeith - Wikimedia Commons]](https://images.hgmsites.net/tmb/polar-bear-on-arctic-sea-ice-credit-aweith--wikimedia-commons_100699490_t.gif)
Just in time for Earth Day, new satellite data corroborates scientists' findings that the Earth is warming at an alarming pace. The new data, from the Atmospheric Infrared Sounder (AIRS) on NASA's Aqua satellite, corroborates findings from the Goddard Institute of Space Studies Surface Temperature Analysis that showed 2015, 2016, and 2017 were the... 
![Smokestacks [CREDIT: Global Climate Budget 2018]](https://images.hgmsites.net/tmb/smokestacks-credit-global-climate-budget-2018_100682094_t.gif)
A new UN report on global climate change isn't quite as dire as one it issued last October. That special report on warming of 2.7 degrees Fahrenheit (1.5 degrees Celsius) showed that the effects of climate change could become catastrophic by 2040, at least 10 years earlier than scientists had predicted. Another report in December by private energy... 
In the wake of the debate over California’s complicated, delayed, and over-budget Los Angeles-to-San Francisco high-speed rail project, a bill introduced to the California State Senate last week comes up with a simpler solution: just add more freeway lanes, and get rid of the speed limit entirely in those new lanes. The bill, SB 319, is... 
There's nothing like hitting people where they live to goad them into action. After a year of record fires in California and floods in Texas and on the East Coast, more Americans are taking climate change seriously—and significant portions are willing to take financial steps to combat it. The first poll, from the University of Chicago Energy... 
A new shorter-range Tesla Model 3 drops into the mix—but not the $35,000 model that many deposit-holders have been waiting for. Porsche will add a more utilitarian hatchback design to its upcoming Taycan electric-car lineup. And VW gives its vehicle lighting more of a message. All this and more on Green Car Reports. Tesla released a... 
U.S. emissions of global-warming greenhouse gases fell 2.7 percent in 2017, despite the Trump administration's efforts to revive coal use in the U.S., the EPA announced on Monday. The EPA released data for 2017, showing an even larger 4.5 percent drop in emissions from power plants compared with 2016, as more coal plants are retired. So electric... 
![EPA administrator Scott Pruitt [photo from 2014]](https://images.hgmsites.net/tmb/oklahoma-attorney-general-scott-pruitt-2014_100584650_t.gif)
Despite the sturm und drang around the announcement by embattled EPA chief Scott Pruitt that he will relax emission limits for 2022 through 2025 vehicles, not much will happen immediately. His determination last week that the Obama administration was "incorrect" and that the limits on those vehicles weren't needed kicks off a lengthy process of... 
While the name of EPA administrator Scott Pruitt is often preceded by "embattled" these days, his agency is now on record as rejecting its own recommendation of just 16 months ago. It concluded in July 2016 that the auto industry had handily met lower carbon-emission limits from 2012 through 2017—at lower cost and with more conventional... 
Today, there are roughly 750,000 plug-in electric vehicles on U.S. roads and about 3,800 powered by hydrogen fuel cells. Proponents of each type of vehicle argue strenuously that their powertrain is a better way to produce vehicles with zero emissions from the tailpipe. Electric cars can be charged at home overnight, and electricity in many areas... 
One of California's largest electricity producers recently published a white paper that analyzed how the state will achieve its 2030 greenhouse-gas targets—and it called into question targets set forth by California regulators. Specifically, Southern California Edison (SCE) said the targeted 4 million electric vehicles isn't nearly enough to... ![Greenhouse-gas emissions of battery-electric vehicles globally in MPG equivalent [U of Michigan TRI]](https://images.hgmsites.net/tmb/greenhouse-gas-emissions-of-battery-electric-vehicles-globally-in-mpg-equivalent-u-of-michigan-tri_100631743_t.gif)
When electric cars first arrived in 2011, it was a reasonable question: Aren't you just shifting emissions from the tailpipe to the smokestack? The answer is yes, but the carbon emissions per mile of an electric car—properly measured on a wells-to-wheels basis—are virtually always lower than those of a gasoline or diesel car. It's not... 
On August 10, the U.S. Environmental Protection Agency announced it would reopen the Comment Period for the vehicle-emission standards for model years 2022 through 2025 it had finalized in January. The auto industry and its lobbyists had complained that the agency had moved too quickly, despite its issuance last summer of a voluminous Technical... 
The best analog to EPA administrator Scott Pruitt's latest action might be for the U.S. Geological Survey to undertake a "scientific critique" of theories that the world is round. After all, numerous authoritative sources over the years have raised doubts that the Earth is not flat. Surely their views deserve to be aired. Late last week, it... 
It's now clear that the zero-emission vehicles of the future will be powered by electric motors. The electricity to power those motors, however, will come from one of two competing technologies: high-capacity batteries or hydrogen fuel cells. The debate over which technology is superior, which has the lowest wells-to-wheels carbon footprint, and... 
The new U.S. president, Donald Trump, is working to eradicate every Obama policy to limit the carbon emissions that contribute to climate change. Having variously called the science behind climate change a "Chinese plot" to hurt the U.S. and referred to it using an expletive for bovine excrement, this shouldn't come as a surprise. He pledged to do... 
The new U.S. administration has made it clear that it does not accept the scientific consensus on climate change. From President Donald Trump down through his nominees for key roles—Scott Pruitt for EPA adminstrator, Rick Perry for Department of Energy head, and others—key elected and appointed officials have rejected the idea of human...