taking a look at some of biden's new climate commitments today, beginning with newshour weekend's ivette felicianowith may boeve, executive director of climate justice organization 350.org. >> reporter: so, may, in broad strokes, looking back at the last four years, what is the trump administration's legacy in regards to climate? and what were some of the major changes in policy over the last four years that impacted the focus of yourork at 350.org? >> we're really running out of words to describe just how damaging donald trump's legacy is when it comes to so many things. so, since we're running out of words, i'll give you a number: 100. that's the number of climate related rollbacks his administration oversaw. that included stopping good things that were already happeng, like the auto efficiency standards. it also included actively making the clate problem worse. so, opening up more federal lands to drilling. so, these 100 rollbacks are incredibly significant, but the good news is, even on day one, president biden started to undo the damage and already exercised his executive authority in crucial