2018/09/13: If the cement industry were a country, it would be the third largest emitter in the world.
Cement use is set to rise as global urbanisation and economic development increases demand for new buildings and infrastructure. Along with other parts of the global economy, the cement industry will need to dramatically cut its emissions to meet the Paris Agreement’s temperature goals. However, only limited progress has been made so far.
cement emissions depend largely on the proportion of clinker used in each tonne of cement. The type of fuel and efficiency of equipment used during clinker production also have an impact.
There are several reasons low-clinker or novel cements have so far failed to reach widespread use.
These technologies are less tried-and-tested than Portland cement, which has been used in construction for centuries. This leads to resistance from cement consumers, particularly in a sector which – for obvious reasons – tends to put safety as a high priority. Many of these new technologies are also not mature enough to reach wide-scale use.
Alternatives also tend to have more limited applications, meaning there may be no single replacement for Portland cement. Their use would, therefore, mean a move away from prescriptive standards.
2018/09/22: Permafrost thawing could indeed release ancient fossil fuels in areas where they intersect.
So now, in the Arctic’s August warmth, she had come back to this isolated spot with a small research team, along with her husband and two young sons, to see what secrets Esieh Lake might yield. Was it simply a bizarre anomaly? Or was it a sign that the thawing Arctic had begun to release an ancient source of methane that could worsen climate change?
When the scientists examined samples of the gases, they found the chemical signature of a “geologic” origin. In other words, the methane venting from the lake seemed to be emerging not from the direct thawing of frozen Arctic soil, or permafrost, but rather from a reservoir of far older fossil fuels.
If that were happening all over the Arctic, Walter Anthony figured — if fossil fuels that had been buried for millennia were now being exposed to the atmosphere — the planet could be in even deeper peril.
Scientists know the permafrost contains an enormous amount of carbon — enough to catastrophically warm the planet if it were all released into the atmosphere. But they don’t know how fast it can come out and whether changes will be gradual or rapid.
the continuing growth of thermokarst lakes — many of which have already formed in the tundra — could more than double the greenhouse gas emissions coming from the Arctic’s soils by 2100. That’s despite the fact that the lakes would cover less than 6 percent of the total Arctic land surface.
2018/08/20: Nearly a quarter of the Northern Hemisphere's landmass sits above permafrost. Trapped in this frozen soil and vegetation is more than twice the carbon found in the atmosphere.
New data from two Arctic sites suggest some surface layers are no longer freezing. If that continues, greenhouse gases from permafrost could accelerate climate change.
in a region where temperatures can dip to 40 degrees below zero Fahrenheit, the Zimovs say unusually high snowfall this year worked like a blanket, trapping excess heat in the ground. They found sections 30 inches deep—soils that typically freeze before Christmas—that had stayed damp and mushy all winter. For the first time in memory, ground that insulates deep Arctic permafrost simply did not freeze in winter.
Could a thaw of permafrost begin decades sooner than many people expect in some of the Arctic's coldest, most carbon-rich regions, releasing trapped greenhouse gases that could accelerate human-caused climate change?
2018/09/11: The future of food in the world will depend on what Africa does with agriculture.
one recent study estimates that elevated carbon dioxide (co2) could cause an additional 33.6 million in sub-Saharan Africa to become zinc deficient and another 16 million protein deficient by 2050 if levels continue to increase unabated. Today, an estimated 60 million African children under 5 years old are stunted due to inadequate nutrition.
Africa contributes little to global greenhouse gas emissions, but is one of the most vulnerable regions to climate change due to its weak ability to adapt to related weather impacts, as well as its dependence on rain-fed agriculture.
A range of actions across sectors is needed to ensure the sustainability of Africa’s food and land use systems - and the health and well-being of millions of children.
2018/07/30: Rising carbon dioxide levels are making the world greener. But that’s nothing to celebrate.
Plant growth is increasing because of rising carbon dioxide. But plants return carbon dioxide into the atmosphere at night.
four reasons he believes nobody should be celebrating global greening.
More Photosynthesis Doesn’t Mean More Food.
Extra C02 in the atmosphere Can Make Plants LESS Nutritious.
Global Greening Will Not Last Forever.
The climate emergency requires actions at emergency speed for a rapid transition to a post-carbon, safe-climate future.
Two tense weeks of negotiations lead to an agreement that could lead to cleaner international trade.
Fablabs, makerspaces, emerging global knowledge commons... These are but some of the outcomes of a growing movement that champions globally-sourced designs for local economic activity. Its core idea is simple: local ownership of the means to produce basic manufactures and services can change our economic paradigm, making our cities self-sufficient and help the planet.
The Paris agreement on climate change charts a narrow path to avoiding a global apocalypse. Just one problem: Its centerpiece is a technology that basically doesn't yet exist.
While engineers are scrambling to come up with grand geo-engineering schemes, they may be overlooking a simpler, less glamorous solution: Soil
Per lo studioso, nel documento finale del vertice appena concluso gli obiettivi sono timidi, così come insufficienti gli aiuti ai Paesi poveri
The climate is messing with your flight is messing with the climate.
New research suggests that the impact of fracking and shale gas in reducing US carbon emissions has been overstated.
8 January, 2015 226136146 Researchers identify the major coal, gas and oil producers that stand to lose most if agreement is reached on cuts to avoid dangerous climate change.
What is a healthy room temperature? On releasing its Cold Weather Plan for 2014, Public Health England has recently revised its recommended minimum levels to keep in good health. No longer, they say, do
E.U. officials are keen to let us know that most of the benefits of the Transatlantic Trade and Investment Partnership - the vast and controversial trade deal currently in negotiation - will come from...
Through burning fossil fuels, humans are rapidly driving up levels of carbon dioxide in the atmosphere, which in turn is raising global temperatures. But not all the CO2 released from burning coal, oil
After decades of trying, U.S. Navy scientists have finally cracked the technology to turn seawater into fuel.
The practical concern for humanity is the high climate sensitivity and the eventual climate response that may be reached if all fossil fuels are burned" - Hansen et al. September 2013 WHO: James Hansen, Makiko Sato, The Earth Institute, Columbia University, New York, NY Gary Russell, NASA Goddard Institute for Space Studies, New York, NY
Leaked drafts of the forthcoming fifth IPCC climate report reveal that scientists are more sure than ever before that we're screwing up the climate.