Réponse :
1. Massive wildfires are a threat to nature: they burned down 9.4 million acres of forests in the U.S in 2015. But some insects can be even more damaging! The bark beetle alrealy destroyed 46 millions of acres of American forests.
2. Since it's first "lights-out" event in 2007,Earth hour grown to engage more than 7,000 cities and towns worldwide.
3. Australia's natural wonder is in danger: 20% of it's coral died this year and experts say it could be too late for the rest.
4. Experts say the last decade will be the hottest in the history with land and sea temperatures reaching an evrage 58 degrees Fahrenheit.
