IB Geography Patterns and Change

UN aid agencies are suggesting wealthy industrialised nations should perhaps rethink their policies on immigration and asylum in the wake of the latest tragedy in the Mediterranean, writes the BBC's Imogen Foulkes in Geneva.

Sir David Attenborough is now patron of the Optimum Population Trust, which lobbies to cut the number of people on Earth. But predicting population change is tricky, says Michael Blastland in his regular column.

Scientists in Bolivia say that one of the country's most famous glaciers has almost disappeared as a result of climate change.

A dramatic 'age quake' is shaking Britain as the country grows older - for the first time ever, the number of people over 65 exceeds those under 16. Here, in the start of a new series looking at the profound financial, emotional and practical issues faced by a rising number of Britons, we report on the best places for retired people to live across the UK.

The UK population is getting older and faces deep financial, emotional and health issues. In the latest part of our series on the fallout from the nation's 'age quake', we examine how a crisis will affect us all as company pension schemes collapse and stock market failures hit private policies. Ruth Sunderland reports on a generation who face working into their seventies - or living out their old age in penury

Which countries have most elderly people?

The world's first floating wind turbine is to be towed out to sea this weekend.

Largely unnoticed, a Third World War is under way. It is a silent war and the enemy is malnutrition. Its victims are mainly children living in less developed countries. And one weapon waiting to be used more widely to combat it is a 'miracle vegetable', Moringa, popularly known in my country - the Philippines - as malunggay.

Migration and displacement, caused by climate change, could vastly exceeds anything that has occurred before, according to a report launched today. Whole human populations may be forced to move for their own survival.

Find out the cold, hard numbers on how much you can reduce your numerical carbon footprint and your grocery bill by switching to these seven low emission eats.

SAN FRANCISCO - In the debate over illegal immigration , San Francisco has proudly played the role of liberal enclave, a so-called sanctuary city where local officials have refused to cooperate with enforcement of federal immigration law and undocumented residents have mostly lived without fear of consequence.

And as you might imagine, it's not pretty- climate change's usual suspects like more severe tropical storms, drought, and raising sea levels make appearances, but it's some of the lesser-known threats detailed here that make the report truly scary

Spiralling global conflicts and worldwide instability have forced millions of people to leave their homes and seek refuge either abroad or in their own countries. The latest figures do not include the wars in Sri Lanka and Pakistan's Swat valley, which have displaced thousands more