In The - This (along with so many innumerable reasons) is why the rain forests are so important. We are destroying so much of our world that we could lose things like this in our lifetime. That's too fast for the Earth to compensate.
According to the National Geographic, rainforests could vanish from the planet completely within the next century if current deforestation rates continue." Here's a really cool infographic that illustrates the many, many reasons why we can't let that happen: