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Read the statement below carefully. Answer True if you think a statement it TRUE. Answer False if you think the statement is FALSE. Give a brief explanation or example to justify your answer. The following are anthropogenic sources of potassium: sewage treatment effluent, fertilizers, and detergents.

Many environmental advocates believe that biofuel made from palm oil is NOT an appropriate replacement for fossil fuels such as petroleum because ________.

________ involves meeting the needs of the present without sacrificing the ability of future generations to meet their own needs.

The ________ system of timber harvesting involves leaving small numbers of mature trees in place to provide shelter for seedlings as they grow.

When habitat loss occurs through gradual degradation, the term for this is

Read the following scenario and answer the question below. Burning fossil fuels and their derivatives produces, among other things, harmful pollutants such as particulates, acid rain-producing sulfur and nitrogen oxides, and carbon oxides. These air pollutants threaten ecosystems all over the world, and high carbon dioxide levels contribute to global warming. Furthermore, fossils fuels have a limited supply. The market price of fossil fuels, especially crude oil, has continued to rise in recent years. Despite this, Americans continue to consume fossil fuels at alarming rates and rely upon them for most of energy needs. At various times, the federal government has considered mandating higher fuel efficiency standards for American vehicles as a possible solution to this environmental energy crisis. Most auto manufacturers, however, are opposed to the imposition of standards. What factor might lead to more political support for higher fuel-efficiency standards?

Which of the following are the major factors that determine a population’s growth rate?

Biodiversity is important because of ___________________, which is searching for organisms that might provide new drugs, medicines, foods, or other valuable products.

Heavy rains and mudslides cause a river to change course, isolating two groups of lizards from one another. If they remain isolated for a long period of time, ________.

What is the greatest contributing factor in the loss of polar bears in arctic areas?