Producing cement is a major source of carbon emissions — 8% of the global total. A company in Massachusetts has altered the recipe, finding a way to produce carbon-zero cement instead. Roughly 8% of ...

As hundreds of companies make “net zero” pledges, it still isn’t clear what that actually means. “We need a commonly accepted, globally aligned definition of ‘net zero’ so we can all mean the same ...

Apart from the cost of utilities, a serious implication of our energy use is that it results in the emission of greenhouse gasses and other pollutants into the atmosphere. A team of students in our ...

Nobody knows who did it first, or when. But by the 2nd or 3rd century BCE, Roman engineers were routinely grinding up burnt limestone and volcanic ash to make caementum: a powder that would start to ...

Starre Vartan is an environmental and science journalist. She holds an MFA degree from Columbia University and Geology and English degrees from Syracuse University. While China is by far the leader of ...

Over decades, centuries and millennia, the steady skyward climb of redwoods, the tangled march of mangroves along tropical coasts and the slow submersion of carbon-rich soil in peatlands has locked ...

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Apple is shooting for total carbon neutrality across all of its business aspects 20 years sooner than the Intergovernmental Panel on Climate Change targets are aiming for. Apple is already carbon ...

Duke recently achieved carbon neutrality — but this doesn’t mean the University’s emissions equal zero. In reality, this historic achievement was made possible by both emissions reductions and the ...

Haley Mast is a freelance writer, fact-checker, and small organic farmer in the Columbia River Gorge. She enjoys gardening, reporting on environmental topics, and spending her time outside ...