Environment- Biodiversity Decline: Causes and Effects

<span><br></span><p style="color:#333333;font-weight:normal;font-size:16px;line-height:30px;font-family:Helvetica,Arial,sans-serif;hyphens:auto;text-align:justify;" data-flag="normal"><span>Plant and animal diversity is declining around the world. Why is this happening? Why is this a problem?</span> </p><span><br></span><span><br></span>