As of 2014, there are 100 multiple-choice questions on the Advanced Placement Environmental Science exam that are based on fundamental ideas, basic facts and major concepts from the field. These include: Earth systems and resources, the living world, population, land and water use, energy resources and consumption, global change, and pollution.
The largest category of questions on the AP Environmental Science Exam concerns pollution. Twenty-five to 30 percent of the questions are in this category. These questions may cover air, noise or water pollution.
Approximately 10 to 15 percent of the questions concern Earth systems and resources, such as geology, atmosphere, water and soil. An additional 10 to 15 percent focus on the living world, including ecosystem structure and diversity, energy flow and biogeochemical cycles. Ten to 15 percent focus on population, including both population biology and human population dynamics. Another 10 to 15 percent are about land and water use, including agriculture, forestry, mining, fishing, global economics and urban development.
The exam includes a focus on energy resources and consumption, representing another 10 to 15 percent of the questions. Some topics in this category include fossil fuels, nuclear energy, hydroelectric power, energy conservation and renewable energy. Ten to 15 percent of the questions concern global change, which includes the ozone layer, global warming and changes in biodiversity.