In the past, mountain forests were often spared as steep slopes and high elevations made deforestation more difficult.
Russia's forests have accumulated a large amount of biomass since the collapse of the Soviet Union three decades ago.
There are ways to take steps toward an environmentally friendly personal and professional life.
African rainforests continued to function as a carbon sink even in the face of adverse climatic conditions.
Forests here and there have regrown in large patches covering an overall area the size of France.
These species can threaten the health of plants and animals, including humans. And they cause huge economic harm.