Jeremy Barrell is the Managing Director of Barrell Tree Consultancy. He is a prolific international speaker and writer, specialising in urban tree management, tree safety and heritage trees.
Brisbane is hot and its people need trees for heat relief, so when an aggressive fungus, Phellinus noxious, began killing its biggest figs in 2006, the city reacted with a corporate programme to stop the rot.
Wandsworth London Borough Council is going to fell an historic avenue of horse chestnut trees on Tooting Bec Common based on 696 responses to its public consultation.
Drive anywhere in the UK and you will find tree planting on new developments in a dreadful state.
Some 50-60 million bison roamed the North American plains before European settlers began displacing indigenous peoples around 1800.
A new Government is a new start, and with it comes new hope that past failures can be recognised to shape a future with brighter prospects. Despite the losers' lament that change is inevitably bad, the opportunities for betterment are everywhere.
For anyone confused about trusting politicians, the 2009 MP expenses scandal provided some useful insights. If that wasn't convincing enough, then the wild extremes of political speculation emerging from the EU referendum debate should be enough to remove any doubt.
Plane wilt is a vascular disorder similar to Dutch elm disease and just as deadly, evidenced by its devastating impact in France. Just one short boat trip away and a London without plane trees will be the reality, not some remote scenario way down the list of national priorities.
Amazon basin soils are often poor and once the forest has been slashed and burned they become increasingly unproductive, driving people to slash more and burn more.
I heard that more than 1,000 street trees had been felled over four months in Sheffield, with many more for the chop in 2016, so I visited to see for myself.
Highways are an obvious source of human discomfort - poisonous gases, particulate pollution, sweat-inducing heat storage and flood-causing rainwater runoff, to name a few.
Protecting trees through tree preservation orders was historically a good idea but the modern reality is somewhat different. Similarly, conservation areas effectively protect local character, but to apply those same principles to trees is a step too far.
The UK planning system does not work very well for trees.
From biosecurity to planning guidance to climate change resilience, Government policy on urban trees is in disarray.
With the general election only months away, the political scramble for the green vote is imminent. How many times have we heard pre-election promises to be "the greenest Government ever" and then consistently seen politicians of all colours fail to deliver?
Gardening Team Leader
Garden Transformation North London
Gardener - RHS level 3 diploma or similar
Stefano Marinaz Landscape Architecture London (Central), London (Greater)
Daylesford Estate Cotswolds
Royal Horticultural Society (RHS) Woking, Surrey
Surrey Private Estate Surrey