Human beings are no stranger to extinctions, where entire species     1    . In the last 500 million years, there have been five times when life on Earth has almost ended. According to scientists, we are now entering the Earth's sixth mass extinction, for which human activity will     2    .

There is a long list of reasons why so many species     3    : pollution, deforestation, farming and overfishing. It is clear that human activity has negatively affected all other species on Earth. If a sixth mass extinction occurs, scientists believe that     4     three quarters of all species on Earth could become extinct. In turn, as we humans depend on so many species for our survival, we would also be     5     extinction.

However, it's not too late to     6     now. We need to take steps to set up nature and wildlife reserves, make good use of wind and solar energy, and reduce our carbon footprint.     7    , if we want to survive, we need to stop destroying the planet that we live on and start to protect it.