Climate scientists have delivered a powerful riposte to their sceptical critics with a study that strengthens the case for saying global warming
is largely the result of man-made emissions of greenhouse gases.
The researchers found that no other possible natural phenomenon, such as volcanic eruptions or variations in the activity of the Sun, could explain the significant warming of the planet over the past half century as recorded on every continent including Antarctica.
Humans must be to blame for climate change, say scientists
