Rapid human population increase and economic activity entail habitat loss and fragmentation, in particular massive deforestation. Forest cover decreased by around 40% from the 1950s to 2000, and the remaining forests are highly fragmented. Slash-and-burn cultivation has a long tradition but with an ever-denser population, forest is cut faster than it regrows, especially in the humid east. In addition, illegal logging of luxury timber species such as rosewood and ebony increased especially with the 2009 Malagasy political crisis. Rare plants, such as endemic succulents and baobabs, are threatened by harvest and trade for horticulture, food, or cosmetics. Global warming is expected to reduce or shift climatically suitable areas for plant species and threatens coastal habitats, such as littoral forests, through rising sea levels.