 Looking 10 to 20 years down the road, the development we ’ ve witnessed these last years would be a challenge if we do not anticipate and pro-actively prevent its negative effects.
<fluency>  Looking 10 to 20 years down the road, the development we ’ ve witnessed these last years would be a challenge if we do not anticipate and pro-actively prevent its negative effects.
 Looking 10 to 20 years down the road, the development we ' ve witnessed these last years would be a challenge if we do not anticipate and pro-actively prevent its negative effects.