Scotch pines on a Christmas tree farm in northern Michigan.
Both natural and artificial Christmas trees have environmental impacts, but they're not major. What matters most is what happens to the trees after the holidays.
Wes Mountain/The Conversation
It takes a eucalyptus tree more than a hundred years to develop hollows suitable to shelter Aussie animals, and just moments to cut it down.
Valuing nature is hardly natural.
Snowpack protects tree roots and soil from harmful freeze/thaw cycles.
Climate change is shrinking winter snow cover in Northeast forests, which protects tree roots and soil from repeated freezing and thawing. This could stunt tree growth and forest carbon storage.
India has developed a pioneering national agroforestry policy.
If we need more trees, many will have to be introduced into managed agricultural mosaic landscapes.
The 1967 Forestry Act is a barrier to integrated forest management in England & Wales.
The Eucalyptus obliqua as seen in Merthyr Park, Tasmania.
Cowirrie/Flickr, CC BY-SA
One of the great Australian trees – messmate stringybark, Eucalyptus obliqua.
Dropping leaves might seem like a waste, but plants are actually saving nutrients.
Even the slightest touch of a D. moroides leaf can cause excruciating pain. An intense stinging, burning pain is felt immediately, then intensifies, reaching a peak after 20 – 30 minutes.
Marina Hurley, Author provided
Depending on the species, touching a stinging tree can be like 30 wasp stings at once or being burnt with hot acid and electrocuted at the same time.
Xanthorrhoea have no real trunk – just tightly packed leaves.
Grass trees are wonderfully odd. They fit no neat definition, and can live up to 600 years.
To grow tall enough to reach the canopy, a species of screw pine unique to Lord Howe Island has evolved its own rainwater harvesting system.
Matthew Biddick, CC BY-SA
How a species of screw pine unique to Lord Howe Island has evolved its own rainwater harvesting system that allows it to grow tall.
Felicity Burke/The Conversation
Urban trees are literally made with the help of human breath – they turn the carbon dioxide we breathe out into the building blocks of plant growth. So your local trees have a piece of you inside them.
The sun sets behind the Statue of Liberty, July 1, 2018.
AP Photo/Andres Kudacki, File
July is the hottest month in much of North America. Experts explain who is most affected by heat waves and ways to cope with them.
Mature trees have horizontal branches that are attractive to wildlife and birds.
The ecological value of old trees is irreplaceable for native Australian fauna. Identifying and preserving these trees in cities through smarter planning strategies is important for local wildlife.
There should be caution in jumping on the “forests are always better” bandwagon.
It's important to be wary of planting trees in places where none exist, or where there are significant water constraints.
It's hard to measure the value of a tree, but scientists equipped with lasers have come one step closer.
Wollemi pines once covered prehistoric Australia.
Wollemi pines have survived for hundreds of millions of years. Once covering Australia, they now survive in a few isolated spots – but they're coming back in a big way.
An ancient giant.
Despite them living for up to 2,500 years, researchers have discovered several baobab trees in Africa have died. Aida Cuni Sanchez on why these trees have a special place in our world.
The Bunya pine is a unique and majestic Australian tree that commands respect.
Enviva’s wood pellet plant in Ahoskie, NC.
Deriving fuel from trees costs more than wind and solar power and it emits more carbon than coal. There are many heated debates about this kind of energy, known as forest or woody biomass.