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    EPA requires municipalities to remove 'forever chemicals' from water systems

    01:00
  • EPA announces new rules targeting 'forever chemicals'

    02:57
  • Environmentalists warn of threat to famed Okefenokee Swamp

    02:39
  • USGS expert explains how geology of Northeast affects intensity of earthquakes

    02:55
  • New York governor addresses earthquake, says no damaged buildings reported

    09:50
  • WATCH: Video shows the moment earthquake struck New Jersey

    00:39
  • Unfazed Long Island electrician says 'back to work' after experiencing earthquake

    02:10
  • NYC subway rider describes earthquake tremors: 'It was very scary'

    03:33
  • Earthquake centered in New Jersey rattles the East Coast

    03:54
  • Watch: Videos show effects of earthquake across Taiwan

    01:26
  • Whale hello there: Coast Guard launches program to protect endangered whales

    05:20
  • 25-year-old becomes first to circumnavigate the globe in electric car

    02:46
  • New program tracks endangered whales and warns ships near them

    02:23
  • Scientists in Utah discover new species of roundworms

    05:18
  • 'It was getting hard to breathe'; Texas couple recalls massive wildfire

    03:46
  • Study finds sewage, pollution from Mexican river poses health risk to Americans

    02:54
  • Videos show downed trees and damage after strong California storms

    01:00
  • Inside the U.S. Coast Guard mission to stop overfishing

    04:20
  • 2023 was the hottest year in recorded history

    02:59
  • Japan searching for earthquake survivors as death toll rises

    02:31

New efforts underway to protect dwindling monarch butterfly population

02:12

The iconic monarch butterfly faces uncertainty after a concerning new report found that the number of butterflies wintering in Mexico dropped by 22% this year. NBC’s Ellison Barber reports on why activists and environmentalists are not losing hope on the species yet.