Americans have recognized Earth Day as an annual celebration of clean air, land and water since 1970. But this year, the nationally recognized day seems like more of a warning than a celebration ― and people are speaking up on behalf of the Earth.

The hashtag #IfOnlyTheEarthCouldSpeak started trending on Twitter on Tuesday ― four days before Earth Day and the coinciding March for Science protests, held to fight anti-science in the Trump administration.

Hundreds of people joined in on the hashtag to give a voice to our planet’s needs, including NASA astronauts and U.S. forest officials. It generated a variety of responses that ranged from heartbreaking to hilarious and sarcastic to bleak.

#IfOnlyTheEarthCouldSpeak it might say water is a precious resource that needs to be preserved for future generations. #ValueOfWater — Atlanta Watershed (@ATLWatershed) April 18, 2017

Dr. Seus came to mind: "I speak for the trees for the trees have no tongues."



#IfOnlytheEarthCouldSpeak pic.twitter.com/dIBcsGkMGo — U.S. Forest Service (@forestservice) April 18, 2017

#IfOnlyTheEarthCouldSpeak It would remind us that it has no borders; we are the ones that create the divides. pic.twitter.com/d495BYMRJZ — Michael L-A (@CommanderMLA) April 18, 2017

The nonprofit Conservation International used the hashtag to revive clips from their film series “Nature is Speaking,” in which renowned actors speak as the various features of our planet, including the ocean, the soil, the mountains, the forests and the coral reef.

Like Tuesday’s tweets, the series reveals a planet that is reeling from human’s destruction, yet aware of people’s dependency on nature. Edward Norton, Harrison Ford, Reese Witherspoon and Liam Nelson lend their voices to the series to deliver Earth’s most dire messages.

Each video ends with a pointed declaration: “Nature doesn’t need people. People need nature.”

With Earth Day fast approaching, this week is as good as any to listen to what our planet might be telling us, even if it’s through the words of our fellow worldly citizens.

Read a round up of the best #IfOnlyTheEarthCouldSpeak submissions below.

“I keep the world cool. Well, I used to.” Liam Neeson gives 'Ice' a voice #IfOnlyTheEarthCouldSpeak https://t.co/fauX9HHOUF pic.twitter.com/xY75I0K0IP — Conservation Intl (@ConservationOrg) April 18, 2017

#IfOnlyTheEarthCouldSpeak

Oh, but it does. Babbling brooks. Roaring waterfalls. Whistling winds. The question is: do we hear it? pic.twitter.com/j6g9l0B8Ws — felicia ruiz😼 (@katwomanfifi) April 18, 2017

#IfOnlyTheEarthCouldSpeak

If you won't quit poisoning yourself, at least quit poisoning me. — Cristina (@CrisHenderson) April 18, 2017

"Please take care of me so I can breathe life into you." #IfOnlyTheEarthCouldSpeak pic.twitter.com/l52jqUvnLc — Loggerhead (@LoggerheadMC) April 18, 2017