French scientists study 740,000-year-old Antarctic ice samples and find clues that point to a relationship between greenhouse gases and global warming. It is feared that the record high carbon and methane levels of today will cause severe climatic change in coming years.
Se desideri guardare questo e altri video, ottieni la nostra prova gratuita.
inglese
tedesco
francese
spagnolo
English
Español
Français
Deutsch
Italiano 
