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![Total Emissions in 2017 = 6,457 Million Metric Tons of CO2 equivalent. Percentages may not add up to 100% due to independent rounding. (Source: U.S. EPA) Politifact_USEPA_WEB.jpg](https://globalchange.mit.edu/sites/default/files/styles/490x340_manual/public/in-the-news/Politifact_USEPA_WEB.jpg?itok=cfgp-cwZ)
Joint Program Co-Director John Reilly highlights need for more precise language (Politifact)
By Jon Greenberg on Friday, September 6th, 2019 at 2:38 p.m.
Near the end of her turn on CNN’s climate change town-hall-a-thon, host Chris Cuomo asked Sen. Elizabeth Warren about lightbulbs. Specifically, if the government should be telling people the kind of lightbulbs they can...
![Photo: Montour Power Plant, PA (Source: Flickr/ PatrickRohe) Jacoby_TheHill.jpg](https://globalchange.mit.edu/sites/default/files/styles/490x340_manual/public/in-the-news/Jacoby_TheHill.jpg?itok=DZKZljpF)
Ongoing U.S. disengagement from global climate action poses significant risks at home and abroad
BY RICHARD RICHELS, HENRY JACOBY AND GARY YOHE, OPINION CONTRIBUTORS — 09/04/19 06:30 PM EDT 1,298
THE VIEWS EXPRESSED BY CONTRIBUTORS ARE THEIR OWN AND NOT THE VIEW OF THE HILL
The Trump administration’s rejection of efforts to limit human influence on the global climate is not...
![Muslim pilgrims gathered to perform Hajj in Mecca, Saudi Arabia. MIT-Haaj-Heat-01_0_WEB.jpg](https://globalchange.mit.edu/sites/default/files/styles/490x340_manual/public/in-the-news/MIT-Haaj-Heat-01_0_WEB.jpg?itok=Ogxn2DsV)
When the Hajj comes in summertime, in some years it may not be safe for participants to remain outdoors
For the world’s estimated 1.8 billion Muslims — roughly one-quarter of the world population — making a pilgrimage to Mecca is considered a religious duty that must be performed at least once in a lifetime, if health and finances permit. The ritual, known as the Hajj, includes about five days of...
![Image courtesy of the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) user facility. Knittel_Axios.jpg](https://globalchange.mit.edu/sites/default/files/styles/490x340_manual/public/in-the-news/Knittel_Axios.jpg?itok=Aukx6ghQ)
CEEPR study makes extensive use of Joint Program's EPPA model (Axios) (Additional coverage: E&E News)
Even "modest" carbon taxes, like those seen in the chart above, would cut emissions as much as the Obama-era vehicle and power plant rules that President Trump is abandoning, an MIT economist found in a new working paper.
Why it matters: The results "underscore the economic power of a...
![Ohio farmhouse with solar panels (Source: Flickr/Ed Chadwick) Dimanchev_Axios.jpg](https://globalchange.mit.edu/sites/default/files/styles/490x340_manual/public/in-the-news/Dimanchev_Axios.jpg?itok=FZbu-kUw)
Study shows that health savings exceed costs of maintaining or strengthening renewables policies (Axios) (Additional coverage: The Verge, CleanTechnica)
Illustration: Aïda Amer/Axios
![Photo: A wind turbine off the coast of Lake Erie in Cleveland, Ohio (Source: Flickr/Sam Bobko) Dimanchev_ERL.jpg](https://globalchange.mit.edu/sites/default/files/styles/490x340_manual/public/news/Dimanchev_ERL.jpg?itok=MmZiM_R6)
Amid rollbacks of the Clean Power Plan and other environmental regulations at the federal level, several U.S. states, cities and towns have resolved to take matters into their own hands and implement policies to promote renewable energy and reduce greenhouse gas emissions. One popular approach...
![Photo: Coal mining in India's Meghalaya State (Source: https://www.flickr.com/photos/ecsp/) Singh_Quartz.jpg](https://globalchange.mit.edu/sites/default/files/styles/490x340_manual/public/in-the-news/Singh_Quartz.jpg?itok=OQC63Fjn)
MIT Joint Program study explains why (Quartz)
Putting a price on coal use is a cheaper way to lower carbon dioxide (CO2) emissions than India’s current policy of inducing states to buy electricity from renewable sources.
India’s newest renewable purchase obligations (RPOs), set by the national government last year, mandate power...
![Photo: Since 2013, annual emissions of a banned, ozone-depleting chlorofluorocarbon (CFC) have increased by nearly 8,000 tons from eastern China. That year South Korea's Gosan GAW Regional Station, on the southwestern tip of Jeju Island, started detecting spikes in CFC-11 levels drifting in from eastern Asia. (Source: The Advanced Global Atmospheric Gases Experiment (AGAGE)) Prinn_Nature_TechReview.jpg](https://globalchange.mit.edu/sites/default/files/styles/490x340_manual/public/news/Prinn_Nature_TechReview_0.jpg?itok=UtcGL369)
The stratospheric ozone layer, which protects us from the sun’s ultraviolet radiation, has recovered considerably from past depletion since the implementation of the Montreal Protocol in 1987 and subsequent amendments, which phased out the production and consumption of major ozone-depleting...
![Photo by Flickr user ianholton, sourced from Flickr - under Creative Commons license Beijing, China - Sun and smog in a hazy orange-brown sky.](https://globalchange.mit.edu/sites/default/files/styles/490x340_manual/public/in-the-news/beijing-hazy_ianholton_Flickr-CC-WEB.jpg?itok=T_WDp-M1)
China’s move away from fossil fuels would mean 2,000 fewer premature deaths in the U.S. by 2030 (Scientific American)
China's pledge to cut its carbon dioxide emissions beginning in 2030 includes a generous gift for its downwind neighbors: less deadly air pollution.
![Source: Flickr/ Roderick Eime Winchester_JATM_WEB.jpg](https://globalchange.mit.edu/sites/default/files/styles/490x340_manual/public/news/Winchester_JATM_WEB.jpg?itok=1TNXSgIk)
Carbon dioxide emissions from aircraft are projected to triple between now and mid-century, even if substantial technology and operational improvements are implemented to make flying more energy efficient. Absent policy constraints, this explosive growth rate will use up a significant proportion...