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GCSE Bitesize was launched in January 1998, covering seven subjects. For each subject, a one- or two-hour long TV programme would be broadcast overnight in the BBC Learning Zone block, and supporting material was available in books and on the BBC website. At the time, only around 9% of UK households had access to the internet at home.
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BBC Learning English is a department of the BBC World Service devoted to English language teaching. The service provides free resources and activities for teachers and students, primarily through its website. It also produces radio programmes which air on some of the BBC World Service's language services and partner stations.
This is an accepted version of this page This is the latest accepted revision, reviewed on 13 February 2025. Gas in an atmosphere with certain absorption characteristics This article is about the physical properties of greenhouse gases. For how human activities are adding to greenhouse gases, see Greenhouse gas emissions. Greenhouse gases trap some of the heat that results when sunlight heats ...
The noble gases have also been referred to as inert gases, but this label is deprecated as many noble gas compounds are now known. [6] Rare gases is another term that was used, [7] but this is also inaccurate because argon forms a fairly considerable part (0.94% by volume, 1.3% by mass) of the Earth's atmosphere due to decay of radioactive ...
Land-use change, such as deforestation, caused about 31% of cumulative emissions over 1870–2022, coal 32%, oil 24%, and gas 10%. [3] [4] Carbon dioxide is the main greenhouse gas resulting from human activities. It accounts for more than half of warming. Methane (CH 4) emissions have almost the same short-term impact. [5]
Women selling produce at a market in Lilongwe, Malawi. Food security is the state of having reliable access to a sufficient quantity of affordable, nutritious food.The availability of food for people of any class and state, gender or religion is another element of food security.
Some of the BBC's revenue comes from its commercial subsidiary BBC Studios (formerly BBC Worldwide), which sells BBC programmes and services internationally and also distributes the BBC's international 24-hour English-language news services BBC News, and from BBC.com, provided by BBC Global News Ltd. [13] [14] In 2009, the company was awarded ...