Speakers of Interest?

Hi all.  I’m trying to help put together a speaker list at my university.  The featured speakers would be talking to a broad range of Landscape Architect students and can range from direct field related topics such as conservation topics, professional practice, applied studies, sustainability and design, etc. or can be motivational and/or about interdisciplinary topics.  Has there been any speakers or lectures that any of you have attended or seen that struck you as amazing and/or inspirational? If so, could you leave their name and possibly what topic they spoke of.  Any help would be greatly appreciated.

Thank You

Jessie West