Plants take up carbon dioxide from the atmosphere and fix the molecules into organic compounds. This is why forests are recognized as significant carbon sinks because they sequester carbon from the atmosphere. Therefore, deforestation is a big contributor to an increase in atmospheric carbon dioxide. The other contributor to an increase of the greenhouse gas is rapid industrialization whereby industries emit carbon dioxide as a pollutant.
The part of a riverbend that will experience the most erosion is the inside corner, this is because the water will be hitting it on two sides, the erosion will likely curve the inside corner more.