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1. Massive wildfires are a threat to nature: they
(burn down) 9.4 million acres of forests in the
U.S. in 2015. But some insects can be even more
damaging! The bark beetle (already/destroy)
46 millions of acres of American forests.
2. Since its first "lights-out" event in 2007, Earth
Hour (grow) to engage more than 7,000 cities
and towns worldwide.
3. Australia's natural wonder is in danger: 22% of
its coral (die) this year and experts say it could be
too late for the rest.
4. Experts say the last decade (be) the hottest in
history with land and sea temperatures reaching
an average 58 degrees Fahrenheit.
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