TIL: Sustainable energy could save USD 4 trillion by 2050. --- Read more here: http://www.euractiv.com/climate-environment/wwf-head-sustainable-energy-save-interview-517757
TIL: Arctic sea ice could disappear entirely over the summer period by 2040.
TIL: The Arctic sea ice and glaciers to shrink by around 11.1% each decade.
TIL: A hurricane releases 50-200 trillion watts of heat energy.
TIL: Energy cannot be destroyed or created - only transformed.
TIL: The word "energy" comes from the Greek "energeia", meaning operation, activity.
TIL: Approx. 30% of energy used in buildings is used inefficiently or unnecessarily.
TIL: Investing $ 1 in sanitation generates a return of $ 5.
TIL: 1.1 billion people defecate in the open.
TIL: 2.5 billion people do not have a clean toilet.