I grew up in Ithaca, graduated from Cornell 34 years ago, and return this weekend to participate in the Ivy Policy Conference which concludes on Sunday, the 48th Earth Day. That confluence of personal, educational, professional and societal milestones gives one pause to consider just how much I personally, and we collectively, have learned about the health of the planet, and about our ability — and most importantly our interest — to help it. The dire situation that the planet is in peril is not in question. Human caused climate change is a fact (sorry, fake news enthusiasts), and it is causing increasingly costly impacts on everything from agriculture, to forest health, to human health. That is not to say greenhouse gas emissions and global warming is the only environmental crisis: plastic pollution killing marine species; dumping water and air toxics in predominantly poor and minority areas; our addiction to pesticides; and our seemingly obsessive fixation on consumerism, are but a few of the other challenges we face.