"The coronavirus pandemic has reminded us why the countryside next door, including our Green Belts, is so important to ordinary people.” (Crispin Truman, CPRE chief executive) The practice of "tree-sitting" is a typical environmentalist deadlock tactic to prevent tree felling used since the 1980s. In the UK, it has been well-known and widely used by eco-activists since the half of the 90s. Since then, they started building platforms and houses on the trees they aimed to occupy and protect from construction plans. The number of “tree protectors” has been growing sharply in England during the last two years - especially since last Summer and the first lockdown. But today's tree protection actions seem to spread out like wildfire not only in the countryside, but also among grassroots urban communities of ordinary citizens of different age and social status, with no previous experience of activism. Following data by a research commissioned by WWF and the Mental Health Foundation, 62 per cent of UK adults found relief from the stress of the COVID-19 pandemic in nature. Therefore, the high numbers of community groups that have contacted the Woodland Trust asking for advice about how to protect and help their street trees, since May 2020, are not surprising. Especially knowing that there were already thousands of similar community calls since 2019. Right now, there are unnumbered neighbourhoods across the UK that are fighting to preserve their trees, or are planting new trees and rallying to support their communities and influence local planning, even during the Tier 4 lockdown. In London, capital that was defined a “forest city” along with the UN guidelines in 2015, this practice has moved beyond the environmentalist demonstrations against the High Speed 2 train-lines or Extinction Rebellion, and has already become part of a newborn urban environmentalism. This is an eco-activism risen from the spirit and needs of groups of common citizens disturbed and surprised by the unexpected further push towards unbridled construction and overbuilding that threatens to change the shape of their green boroughs. Considering that sixty-six per cent of the world population will live in cities by 2050 (UNDESA), and 83% of the UK population already lives in towns and cities, achieving the sustainable development of urban areas is the crucial challenge of the 21st century. Therefore, the plans to fell and consumeristically “substitute” venerable trees with saplings is appalling to a growing number of citizens of the very first European state that officially declared the Climate Emergency, in 2019. Furthermore, considering the lack of appreciation, the shrinking budgets and the simple neglect of the environmental emergency that are still the main features of nowadays' urban planning the strong reactions by those whose environmental consciousness has exponentially wakened during the pandemic are not surpeising. It is possibly in virtue of such awareness that a growing number of urban neighbourhoods are exercising their active citizenship again. They are uniting in defence of their trees, highlighting the value that mature trees have in a community, their cultural and social importance based on memories, aesthetic features, and the sense of wellbeing they bring. Unknown neighbours are simultaneously feeling the same needs and becoming communities again. Kids, grannies, teenagers, fathers, mothers suddenly unite, practice their civil rights through thousands of letters, petitions and direct actions. Where every effort to protect a venerable tree in town is not only an eco-political action, as it gives birth to a whole system of relations, negotiations and human exchanges rooted in the tremendous amount of time and efforts that this pacifist eco-activism - moving among courts, camps and campaigns - requests. This is an ongoing documentary project on the most urging crisis of our time, depicted through the daily life and fights of the grassroots communities that are coming to life through the crisis. The pandemic has imposed a new physical distance among people through social distancing. But the new awareness of our mistakes as mankind is bringing to life new feelings of empathy and hope, that are giving birth to an eco-systemic solidarity that is organically oriented toward the unconditional protection of our natural environment from ourselves.