Surging levels of carbon dioxide sent greenhouse gases in the atmosphere to a new record in 2013, while oceans, which absorb the emissions, have become more acidic than ever, the UN said on Tuesday.
"We know without any doubt that our climate is changing and our weather is becoming more extreme due to human activities such as the burning of fossil fuels," said Michel Jarraud, the head of the World Meteorological Organization (WMO) that released a report on the issue on Tuesday.
The Earth’s protective ozone layer is on track to recover by the middle of the century, the United Nations today reported, urging unified action to tackle climate change and curb continued fluctuations to the composition of the atmosphere.
That is according to the assessment of 300 scientists in the summary document of the Scientific Assessment of Ozone Depletion 2014, published by the UN Environment Programme (UNEP) and the UN World Meteorological Organization (WMO).
A team of research conservationists with members from several universities in the U.S. is suggesting in a paper they've had published in Proceedings of the National Academy of Sciences, that urban areas could benefit by investing in cost effective reforestation efforts around urban areas that currently suffer from high ozone levels.
Planting trees, they suggest could help cities bring those levels down.
Rising CO2 concentrations in the atmosphere will stimulate harmful algal blooms at a global level.
This warning is issued by scientists Jolanda Verspagen and Jef Huisman of the University of Amsterdam, The Netherlands, on the basis of new mathematical models, laboratory experiments and field research. Their results will be published open access in the scientific journal PLOS ONE.
This ultralow-density, ultrahigh surface area bulk material with an interconnected nanotubular makeup could be used in catalysis, energy storage and conversion, thermal insulation, shock energy absorption and high energy density physics.
Ultralow-density porous bulk materials have recently attracted renewed interest due to many promising applications.
Whilst hydrogen cars look set to be the next big thing in an increasingly carbon footprint-aware society, sustainable methods to produce hydrogen are still in their early stages. The HYTIME project is working on a novel production process that will see green hydrogen being produced from grass, straw and food industry residues.
When sustainability and bioeconomy are being discussed, the words 'hydrogen' and 'biomass' are usually not too far away - although rarely mentioned in the same sentence. But what if hydrogen could be produced directly from second generation biomass?
To reduce fire hazard in the United States, wildland managers often utilize the silvicultural practice of mechanically cutting woody shrubs and suppressed trees (ladder fuels).
These cuttings and other post-logging debris are then burned during periods of low fire danger in order to dispose of the material.
In a recent article on The Conversation, University of Melbourne Professor Emeritus Frank Larkins wrote that Australia's targets to increase renewable energy will make electricity more expensive, thanks to problems with consistency and storage.
But Professor Larkins is several years behind developments in renewable energy and its integration into electricity grids. In fact, we already have technically feasible scenarios to run the Australian electricity industry on 100% renewable energy—without significantly affecting supply.
Autonomous Non-Сommercial Organization "International Sustainable Energy Development Centre" under the auspices of UNESCO, 2025