There are modern-day Druid groups who gather in England, but everyone everywhere needs to find their inner Druid.
Although the word means "people of the oak" (the queen of trees), all trees are druidical.
Ancient Druids considered Nature the sacred Source (note the etymology of nature-native-nativity), the Truth-deity whose name was at first only spoken. It was sung about by the bards but not written down. Later, they did write their wisdom in an ancient Irish alphabet called Ogham, in which each letter takes the name of a tree.
Scholars write that the first Druids named Truth itself a deity, thinking of the sacred word of Nature. It was "hallowed" -- whence the words holy, wholly, hale/hail, haelen, healing and health. We still have the understanding that nature heals and nature speaks; some people hear it speaking all the time. (Next time you pass a tree, give it a greeting: "Hail fellow well met". The trees can hear us, too.)
We need more people who think like Druids, who don't call trees a "resource" or a "product" important to "the economy". They're not a thing that stands in the way when we want to erect a building in its space. To Druidic-folk each tree is inseparable from the rest of tree-society and its companion species, a being that has standing which our legal system doesn't recognize, ours not being as subtle as the Druidic law which was recited throughout northern Celtic and pre-Celtic Europe by the law-singers. That way, everyone knew what the law was. Through repetition it was remembered.
Unfortunately, as waves of newcomers (Romans and such) marched across the Celtic lands with their own ideas about law and governance, Nature's law was forgotten. Many ancient Roman scribes got the gist of it down on paper however, although -- naturally -- not agreeing with each other about its meaning.
Today we (especially urbanites) must take from Druid lore what we can in the struggle for tree conservation. Science is crucial of course, and science too is increasingly bringing knowledge of sub-cellular, meta-genetic vibrational phenomena pervading the natural world. Gaia Spirituality becomes Gaia Science, in other words -- another way of knowing that keeps breaking through, still, even in a barren, digital, robotic, virtual world. But for how long? Regarding the future: how will Artificial Intelligence be capable of achieving the Gaian "way of knowing"? Quo vadis, Humanity?