Universal access to modern energy sources can help make progress towards a number of Millennium Development Goals.
Key facts, figures and dates
Key facts, figures and dates
With the world's food security facing a looming "perfect storm", GM food crops need to be part of the solution.
Use this glossary to find out more about some of the well-used - but often misunderstood - terms in US politics.
A chronology of key events
A problem shared is a problem halved, goes the old saying. But what happens if you share a problem with millions of people? Are you left with a millionth of a problem? Or just lots of rubbish suggestions?
All the key points, analysis and reaction to George Osborne's first Budget as chancellor in the coalition government.
All the key points, analysis and reaction to George Osborne's first Budget as chancellor in the coalition government.
Some doctors and nurses believe people with learning disabilities get a poorer standard of care, says a charity.
Coverage as US President Barack Obama makes a primetime TV address on the Gulf of Mexico oil spill, live from the Oval Office of the White House.
Key facts, figures and dates
A healthcare union says it is shocked after learning that incidents of potential public concern were discussed behind closed doors by a hospital trust.
A Chinese HIV/Aids activist group says its work is becoming increasing restrictive as the government is "wages war" on civil society in the country.
The BBC profiles Yukio Hatoyama, who has resigned as Japan's prime minister.
A cancer patient who has a phobia of hospitals should be forced to undergo a life-saving operation if necessary, a judge rules.
R.I.P the National Identity Card for the UK, ditched by the new government because of concerns about civil liberties. But John Kirby - one of 15,000 people who took up the card - says he will miss this simple form of ID.
A man died from infected bedsores because his care at a nursing home was inadequate, an inquest rules.
investigates concerns that the punishment is not fitting the crime when it comes to UK firms guilty of corruption abroad.
The UK is lagging behind other high income countries on cutting child mortality and is the worst in Western Europe, international figures show.