Encoding::UndefinedConversionError: U+20AC from UTF-8 to ISO-8859-1
<p>In console:</p>

<pre><code>"DÃ©veloppement".encode("iso-8859-1").force_encoding("utf-8")

str= "capital buffers for ccps â€˜the way forwardâ€™, says cpmi chair"

str.encoding.name #"UTF-8"

str.encode("iso-8859-1").force_encoding("utf-8")  
</code></pre>

<blockquote>
  <p>#Encoding::UndefinedConversionError: U+20AC from UTF-8 to ISO-8859-1</p>
</blockquote>

<p>I want to convert <code>str</code> to Readable String.</p>