Another Friday, another global show of support in the fight against climate change. On social media, environmental activists from all over the world, including Greta Thunberg of course, are keeping the movement going.

As defiant and confident as ever, Greta held up her "School strike for climate" sign to the camera – the same one she carried in front of the Swedish parliament in the summer of 2018, when she first started a protest that would grow into a worldwide phenomenon.

Almost three years later, the young activists entered their 132rd week of calling for urgent change. They will not be blown off-course, despite the raging pandemic and largely disappointing reaction from politicians, who often only pay lip service to climate policy .

"Dear Governments, You may not be able to see us physically, but we will not let you forget us. We are here & you will listen. We are still powerful, we are still strong & we will never give up fighting for what's right... Liberation, Justice, Equity," Thunberg quoted a fellow activist on Twitter.

From every continent, protesters are posting messages, photos, and selfies, as they try to use the digital sphere to keep momentum going while lockdowns remain in place.

Here are some of their effots.

It remains to be seen if their struggle can keep climate change top of the agenda. In that respect, the Biden administration's first moves have been encouraging, as a raft of executive orders brought the US at least back in line with the leading global initiatives.

But as the young activities striking for their future point out, much more is needed to face the existential challenges lying ahead.