"student friendly" professional events in NYC tri state?

Currently in first year undergrad, looking to do as much in person networking as I can. What conventions and such should I look into?

Obviously willing to travel, just maybe not as far as California (although never say never).

My current focus is on green energy, and I've found a number of options for that, but I'm more concerned with meeting cool people than I am with laser focus in AM.

Thanks so much in advance for any help

Joe