How tropical forest carbon stocks might alter in response to changes in climate and atmospheric composition is uncertain. Verkkothe amazon rainforest is one of the most important barriers against unchecked warming and intensifying drought cycles in brazil and beyond. Verkkothe land ecosystems of the world together absorb about 30% of the carbon dioxide released by burning fossil fuels; Scientists think that most of this. Verkkothe green giant arborvitae or thuja green giant is a spritely evergreen tree that adds wonder and beauty to all kinds of landscaping arrangements. Verkkooliver lawrence phillips, frs is a british ecologist who specializes in tropical forests and is currently professor of tropical ecology in the school of geography at the. Verkkothe terrestrial carbon sink has been large in recent decades, but its size and location remain uncertain.