In some parts of the world, forests are being cut down and burned to clear land for new homes and new farmland. a negative effect of these activities might
1. an increase in global warming
2. destruction of the ozone shield
3. a decrease in the average temperature of the atmosphere
4. an increase in biodiversity of the deforested areas

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.