NASA has said that astronomers searching the atmospheres of alien worlds for gases that might be produced by life can't rely on the detection of just one type, such as oxygen, ozone, or methane, because in some cases these gases can be produced non-biologically.
The ozone layer that shields life from cancer-causing solar rays is showing its first sign of recovery after years of dangerous depletion, a UN study said on Wednesday, in a rare piece of good news on the environment.
The depleting ozone layer is well on track to recovery in the next few decades because of "concerted international action", according to an assessment report by UN Enviornment Programme and World Meterological Organisation.
India on Wednesday attributed the
success of the Montreal Protocol on Ozone depleting substance
to the principle of "common but differentiated responsibility
and respective challenges" being agreed by the developed