The only way to connect the major wildernesses of the world and save their inhabitants is to think big. Very big.

A shifting climate won't just stunt crops in poor countries, it could devastate their entire economic growth, warn economists.

High gasoline prices could lead to a dramatic saving in US greenhouse-gas emissions. That's the conclusion of economists in the US, who suggest high fuel prices are turning consumers off SUVs and onto smaller, more fuel-efficient vehicles. What's more, car owners are predicted to cut back on driving in order to save money. Together, these changes in consumer behaviour could make an important dent in the US contribution to global warming, reducing annual carbon dioxide emissions by tens of millions of tonnes per year.

We should not wait to cut back on burning fossil fuels until we have developed greener technology to supply our energy needs, despite what many economists are advising their respective governments. Such a waiting game may have deadly consequences. Feb 27, 2008

It is well known that when the dangers of smoking became increasingly obvious in the 1950s, tobacco companies funded scientific research aimed at downplaying the risks. Now, a little-known strand of that campaign, aimed at giving an intellectual gloss to pro-smoking arguments, has been detailed for the first time.

Vaccination is one of medicine's greatest achievements, so why do so many people fear it? : a report

As the world warms, the plants that billions of people depend on for their food are likely to become less nutritious. That's the worrying conclusion of an analysis of more than 40 studies investigating how crops will react to increasing levels of carbon dioxide in the atmosphere.