“One voice can change a room, and if one voice can change a room, then it can change a city,” Barack Obama famously said in his stirring, still memorable speech at the 2004 Democratic National Convention in Boston. “And if it can change a city, it can change a state, it can change nation. And if it can change a nation, it can change the world. Your voice can change the world.”

Little more than a week before the planned worldwide strike on March 15 by students and grade-school pupils protesting the effects of climate change on future generations, support is surging for the legal case Juliana v. United States, in which 21 young people have sued the US federal government over climate change. A “Young People’s Brief” amicus brief was filed in US court last Friday, alongside briefs filed by environmenatlaist, women’s groups, business leaders and eight members of the US Congress in support of a case that has been before the courts for months now. On two separate occasions, US federal administrations — first under Barack Obama and again under Donald Trump — have tried to have the lawsuit tossed out of court. The government has lost both times. A early, lower-court ruling by an Oregion judge, giving legal reasons why the case should be allowed to continue, was appealed to the US Supreme Court twice. Both times, the Supreme Court sided with the climate activists over the government.

Students and school pupils from some 50 countries have said they will rally together in the March 15 demonstration, even as the strike is being dismissed on both the right and left as a cheap publicity gimmick — so much hot air, if you will — and an excuse to skip school for a day.

As it is, school students in Australia, France, the UK, Germany, Ireland, Poland, Thailand, Colombia and Uganda have already skipped a day of school to demand stronger climate action from their governments, as part of 16-year-old Swedish student Greta Thunberg’s #FridaysForFuture climate campaign. Thunberg, who started the whole process as a solo campaigner outside the Swedish parliament last year, has become a lightning rod for both praise and controversy, and has been mentioned as a possible Nobel Peace Prize candidate, and was recently invited to speak at the World Economic Forum in Davos, Switzerland. Some saw this as a cyncial ploy on the part of fat-cat industrialists who have already done their part to wreck the planet, but the truth is that — whether useful idiot or Nobel material — Thunberg herself couldn’t really give a (compost heap) how she’s perceived. The issue is what drives her, and that’s what has made her such a compelling voice for climate activism. She really couldn’t care whether she wins the Nobel Prize or gets to dine at Davos (don’t feed her lobster!) or not, and she’s the first to lash out sharply at soothing but empty feel-good words from those in power. Words don’t count anymore, actions do. She’s told people on her own side that. Actions deferred, whether it’s the Paris Agreement or tepid promises at the climate conference in Rio de Janeiro to scale back carbon emissions by 2050 mean nothing, she says. We need action, and we need it now.

That this argument was first made by a 15-year-old would have seemed laughable a year ago, and the truth is that many people did laugh at the time.

Well, they’re not laughing now.

In a stroke of good timing — though, knowing the way the media works, I suspect it was planned that way all along — 60 Minutes’s Steve Kroft presented a news segment, The Climate Kids, on North America’s most-watched news-magazine program this past weekend. The amicus brief this past Friday was co-signed by 30,000 young people. Now, all of a sudden, those 21 students who filed the original court case have swelled in number to the tens of thousands.

That number will only grow on March 15.

Will any of this make any difference? It’s hard to tell. I’ve commented here about how the 1973 Hollywood thriller Soylent Green, itself based on the dystopian sci-fi novel Make Room! Make Room! by the American novleist Harry Harrison, eerily foreshadowed a world overrun by too many people and choked by carbon emissions, where fresh strawberries are a near-priceless luxury that only multi-millionaires and captains of industry can afford — until they’re murdered as part of a corporate coverup, in case the proles — i.e. us — find out what’s really going on and rebel against their masters.

Soylent Green proved popular in its day, and has endured enough to be referenced even today— but as Greta Thunberg would point out, so what? What’s actually been done? 62 million American voters voted for Donald Trump to be their president, and this is a man who doesn’t even beliheve there’s a problem.

Xiuhytexcatl Martinez, the 19-year-old indigenous environmental activist and youth director of the self-explanatory Earth Guardians, is one of the lead plaintiffs in the suit, alongside climate scientist Dr. James Hansen. The suit — which many dismissed at the time, remember — argues that the US federal government has failed itd responsiblity to safeguard the health of future generations. The very air we breathe is at risk from rising carbon-dioxide emissions, which in turn affects global warming, a now-unfashionable phrase that most if not all legitimate climate scientists agree is the prime driver behind climate change. “What’s at stake right now,” then-15-year-old Martinez told the UN General Assembly in 2015, “is the existence of my generation.”