Making a neighborhood a historic district doesn't stop development, but it does make it impossible for developers to raze many of the existing structures and requires them to seek commission approval for new ones on vacant lots.

WSJ: Mayor of Preservation

"We don't think it would stop the poaching crisis, we think the legal trade could make it worse, " he added.

BBC: Rhino horn - time to legalise the trade say researchers

"We may not be able to stop it from leaving, but the Clemenceau won't necessarily make it all the way to India, " said a spokesman.

BBC: NEWS | Europe | Asbestos ship 'can sail to India'