Climate Threat Global Challenges

Antarctic Cores to Provide Answers on Historical Emissions

Pieces of the core from Antarctica's deepest ice layer could hold information that "revolutionizes" what we know about climate change. The BBC reports.

The cylindrical ice cubes are believed to be more than 1.5 million years old and have now landed in a laboratory in the UK where they will be melted.

It took a huge international collaboration and millions of kronor to get them out of the ice core. They are hoped to reveal evidence from earlier historical periods when carbon dioxide levels in the air may have been naturally as high or higher than they are today.

- Our climate has been through so many changes that we really need to go back in time to understand the different processes and their different turning points, says Dr. Liz Thomas, who leads the study, to the BBC.

The problems with mass tourism
Barcelona's mass tourism to be curbed with new strategy

Authorities and politicians in Barcelona have decided to limit the capacity to receive cruise tourists, as a way to curb mass tourism, reports Reuters.

The capacity to receive travelers will be reduced by reducing the seven terminals in the port to five by 2030. The hope is that congestion will decrease at popular attractions, and that more tourists will stay longer and not just overnight.

The decision has been made after a sharp increase in the number of cruise tourists in the past year.