Under a worst-case projection of global surface warming, which of the following agricultural activities would be most closely associated with temperature increases of 4 degrees Celsius or less?

1.livestock ranching in central Asia

2.pastoral nomadism in northern Africa

3.shifting agriculture in central Africa

4.grain production in northern South America

5.dairy farming in eastern North America

Which of the following continents has the highest amount of coastline near oil spills?

1.Antarctica

2.South America

3.Australia

4.Asia

5.Africa

In which of the following natural regions has the most deforestation occurred?

1.Mediterranean

2.steppe

3.deciduous forest

4.tropical rain forest

5.tropical savanna

In western Africa, which natural region has the highest percentage of area with high and very high risks of desertification?

1.highland

2.tropical rain forest

3.tropical savanna

4.desert

5.Mediterranean

The most forest damage has occurred in which natural region?

1.mixed forest

2.tundra

3.taigaforest steppe

4.mountain