Bonsoir !!
1- Massive wildfires are a threat to nature : they burnt down 9.4 million acres of forest in The U.S. in 2015. (preterit => action passée terminée). But some insects can be even more damaging ! The bark beetle has already destoyed 46 millions of acres of American forests. (P.perfect => action qui continue dans le présent + already)
2- Since its first "lights-out" avent 10 2007, Earth Hour has grown to engage more than 7,000 cities and towns worlwide. (present perfect => action débutée ds le passé et qui continue ds le présent)
3- Australia's natural wonder is in danger : 22% of its coral died this year and experts say it could be too late for the rest. (preterit action passée datée)
4- Experts say the last decade has been the hottest in history with land and sea temperatures reaching an average 58 degrees Fahrenheit. (bilan entre le passé proche et le présent)
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bonne fin de soirée ☺☺☺
