Is space a waste of time? The ethics of leaving earth

Space advocates spruik the human benefits but critics say it costs far too much. Ever since the moon landing, space has been seen as a “giant leap” for humankind, but is it in the wrong direction?

Pressure ramps up to pull CO2 from the sky with geoengineering tech

Experts say humanity has only 10 years to have large-scale carbon dioxide reduction schemes up and running if global warming is to be restrained to 1.5 degrees Celsius. Here are some of the schemes that are being explored….