The charring of the Earth by natural and man-made forest fires will dump additional quantities of carbon dioxide into the atmosphere. Changes in temperature and change the composition of the forests. At the present rate of destruction, most of the rain forests will be gone by the middle of the next century. The will allow man-made deserts to encroach on once lush areas.
Evaporation rates will also increase and circulation patterns will change. Decreased rainfall in some areas will results in increased rainfall in others. In some regions, river flow will be reduced or stopped all together all together completely. Other areas will experience sudden downpours of the continents, which normally experience occasional droughts, might become permanently dry wastelands. Vast areas of once productive cropland could lose topsoil and become man-made deserts. Coastal regions, where half the human population lives, will feel the adverse effects of rising sea levels as the ice caps melt under rising the ocean temperatures.
If the present melting continues, the sea could rises as much as 6 feet by the middle of the next century. Large tracks of coastal land would disappear, as would shallow barriers islands and coral reefs. Low-lying fertile deltas that support millions of people would vanish. Delicate wetlands, where many species of marine life hatch their young, would reclaim by the sea. Vulnerable coastal cities would have to move the farther inland or build protective walls against the angry sea, where is a larger number of extremely dangerous hurricanes would prowl the ocean stretches.
Forests and other wildlife habitats might not have enough time to adjust to the rapidly changing climate. The warming will rearrange entire biological communities and cause many species to become extinct. Weeds and pests could overrun much of the landscape. Since life controls the climate to some extent, it is uncertain what long-term effects a diminished biosphere will have on the world as a whole.
