413 search results
Too much of a good thing? Choice challenges in sustainable clothes shopping
Money & Business

Too much of a good thing? Choice challenges in sustainable clothes shopping

...carbon; recycled), but there is little guidance to help shoppers navigate a ‘best’ purchase choice. There is not a single, international, all encompassing ‘omni-label’ that covers everything, so – is it better to choose recycled materials or support fair wages when buying that T-shirt? H&M offer organic leather, hemp, silk, cotton and linen but also garments...
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Article 5 mins
Speed of Arctic changes defies scientists
Nature & Environment

Speed of Arctic changes defies scientists

...carbon dioxide and methane. The WMO secretary-general, Petteri Taalas, said the Arctic changes had also been a factor in unusual winter weather patterns in North America and Europe. He said the thawing of the permafrost could release vast quantities of greenhouse gases into the atmosphere. “These are part of the vicious circles of climate change which are the subject of...
View article Speed of Arctic changes defies scientists
Article 10 mins
Understanding water quality
Nature & Environment

Understanding water quality

...carbon dioxide. Natural rainwater is slightly acidic as a result of this reaction, with an average pH of 5.7, whereas the average pH of seawater is 8.2 (Box 1). Rainwater may be even more acidic in areas where the highly soluble acidic gases sulphur dioxide and nitrogen dioxide (both produced by fossil fuel power generation, transportation and industrial processes) are...
View course Understanding water quality
Level 2: Intermediate 10 hrs
White dwarfs and neutron stars
Science, Maths & Technology

White dwarfs and neutron stars

...carbon and oxygen in the star’s core, again releasing energy. Low mass stars (< 3 M☉) and intermediate mass stars (in the range 3–8 M☉) ultimately begin a second ascent of the red giant branch (known as the asymptotic giant branch, or AGB) when core helium is exhausted and helium fusion only continues in a shell surrounding an inert carbon/oxygen core. Massive...
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Level 3: Advanced 6 hrs
Icy bodies: Europa and elsewhere
Science, Maths & Technology

Icy bodies: Europa and elsewhere

...carbon-rich) material erupted from geysers. The rugged surface beyond the polar cap is methane-rich ice, contaminated by nitrogen, carbon dioxide, carbon monoxide and water. (NASA) Beyond its large satellites each giant planet has a second collection of small irregular-shaped satellites, travelling in elongated, inclined and in many cases retrograde orbits. Most are dark...
View course Icy bodies: Europa and elsewhere
Level 2: Intermediate 17 hrs
What will Donald Trump do for the environment?
Nature & Environment

What will Donald Trump do for the environment?

...carbon trading market. Critics will argue that China’s environmental commitments and policies, both domestically and internationally, have many shortcomings. But China has shown much greater initiative on challenges like climate change in recent years. Provided that a critical mass of other countries stand together with China, the global environmental agenda can...
View article What will Donald Trump do for the environment?
Article 5 mins
Leaving the EU means losing access to EU agencies - so why aren't we talking about it?
Society, Politics & Law

Leaving the EU means losing access to EU agencies - so why aren't we talking about it?

...carbon dioxide emissions and reduce fuel consumption. Two EU agencies are based in London. One, the European Banking Authority, was set up in the wake of the financial crisis to help stabilise the EU by safeguarding the integrity and efficiency of the banking sector. It will now almost certainly move to a eurozone country. This would mean a loss of expertise that...
View article Leaving the EU means losing access to EU agencies - so why aren't we talking about it?
Article 5 mins
Winchcombe Meteorite: Insights from the First Scientist on the Scene
Science, Maths & Technology

Winchcombe Meteorite: Insights from the First Scientist on the Scene

...carbon and nitrogen isotopic composition of these very important extraterrestrial samples. The arrival of the Winchcombe meteorite is a big bonus for UK science. Samples from the asteroid Ryugu have just been returned to Earth by the Japanese Space Agency JAXA and the NASA mission OSIRIS-REx will be returning samples from asteroid Bennu in 2023. Asteroids Ryugu and Bennu...
View article Winchcombe Meteorite: Insights from the First Scientist on the Scene
Article 10 mins