Short answers, pulled from the story.
Deforestation in tropical regions released an average of 2.6 billion tonnes of carbon dioxide each year between 2010 and 2014. This output accounted for 6.5% of all global greenhouse gas emissions during that period.
By later assessments, the figure rose to approximately 11% of total global emissions from human activities. Land use change remains the second largest source of carbon dioxide emissions worldwide after fossil fuel combustion.
The Bali Action Plan was developed in December 2007 in Bali, Indonesia as a direct result of the Kyoto Protocol from 1997. Member countries committed to creating policy approaches that incentivize emission reductions caused by deforestation in developing nations.
The United Nations Environment Programme launched the Billion Tree Campaign in 2006 with an initial target of one billion trees. In December 2011, UNEP handed management over to Plant-for-the-Planet based in Munich, Germany.
A study published in 2023 found that tropical deforestation has led to a measurable decrease in observed rainfall. Researchers anticipate that by the year 2100, deforestation in the Congo will diminish regional precipitation levels by up to 8-10%.