Look at this scrumptiuos mouthfull o' pine... I'm a beaver that hails from the coniferous forests of the Northwest, Oregon to be precise. It's evergreens as far as the eye can see. What is a Pine tree? Well, there are a bunch of them, including Cedars, Douglas-Firs, Cypress', Junipers, Hemlocks, Redwoods, and Spruces. There are approximately 630 different species of conifers. That is a relatively small number of species, but they have a dramatic ecological importance. Most notably, the Boreal forests of the Northern Hemisphere (Canada, Sweden, Russia, etc.). Conifers have many wintertime adaptations, including conical shape and drooping limbs so that snow doesn't weigh them down and break the branches.
Conifers are extremely important to humans. In fact, Coniferous forests are the largest terrestrial 'carbon sink,' meaning the trees literally remove Carbon Dioxide (CO2) from the air. The removal of Carbon Dioxide occurs in all plants during Photosynthesis. Basically plants takes the energy in photons provided by the sun and uses them to create sugars(glucose) from CO2. With the increase in CO2 due to a few billion medling humans, we can use all of the help we can get.