Discover Q&A generated by AI Answer Generator

The primary cause of soil erosion is over cultivation. Over cultivation can lead to the depletion of soil nutrients and structure, making the soil more susceptible to erosion by wind and water.

Secondary sewage treatment is designed primarily to remove the dissolved organic matter. This stage of treatment typically involves biological processes that break down organic pollutants in the wastewater.

The primary challenge of using many renewable energy resources is that they are diffuse and intermittent. This means that renewable energy sources like solar and wind are not always available at the times and places where energy is needed, which can make it difficult to rely on them as a consistent energy supply without effective storage or backup systems.

Stratospheric ozone destruction involves a complex series of reactions that begin with UV from sunlight causing Cl atoms to break free from CFCs. This process is a key step in the breakdown of ozone (O3) in the stratosphere, as the released chlorine atoms can then catalyze the destruction of ozone molecules.

The American consumption of organic foods increased approximately 20% from 2004 to 2006.

A watershed is the area of land from which rainfall drains into rivers or lakes.

Passive solar technologies use the energy of sunlight without relying on electrical or mechanical devices. These technologies typically involve architectural design and materials that maximize the absorption of sunlight for heating and natural lighting, such as strategically placed windows, thermal mass, and insulation.

The reason the Montreal Protocol remains one of the most successful international agreements to manage CFCs as an air pollutant is that it was easy to monitor the production of the pollutant. The production and use of chlorofluorocarbons (CFCs) were relatively straightforward to track, which facilitated compliance and enforcement of the agreement among participating nations.

Air pollution is best defined as gases or particles present in high enough concentrations in the atmosphere to harm humans, other organisms and structures.

Ocean acidification is primarily a consequence of climate change. It occurs when increased levels of carbon dioxide (CO2) in the atmosphere lead to higher concentrations of CO2 being absorbed by the oceans. This process results in the formation of carbonic acid, which lowers the pH of seawater, making it more acidic.

The EPA regulates the demolition and renovation of older buildings because they may contain asbestos.

The naturally emitted gas that has been linked with lung cancer in humans is radon. Radon is a radioactive gas that can accumulate in indoor spaces, particularly in basements and lower levels of buildings, and long-term exposure to high levels of radon is associated with an increased risk of lung cancer.

The new urbanism promotes the development of cities with community collaboration in development decisions. This approach emphasizes walkable neighborhoods, mixed-use development, and a focus on community engagement in the planning process.

The 1999 Protocol, also known as the Gothenburg Protocol, primarily targeted reductions in sulfur dioxide, nitrogen oxides, volatile organic compounds (VOCs), and ammonia. However, it did not specifically target the reduction of CFCs (chlorofluorocarbons), as these substances were primarily addressed under the Montreal Protocol, which focused on ozone-depleting substances.

Therefore, the correct answer is CFCs.

The correct answer is Food security.

In 1848, the largest part of San Francisco Bay had an area defined by approximately 40 × 150 mi.

In the context of biomagnification, the organism that would be expected to contain the most mercury in a contaminated lake is fish-eating birds.

Biomagnification refers to the process by which the concentration of a substance, such as mercury, increases as it moves up the food chain. In this case, small fish would accumulate mercury from their diet of algae and aquatic insects, and larger fish would accumulate even more mercury by eating smaller fish. Finally, fish-eating birds, which are at the top of the food chain, would consume large fish and thus have the highest concentration of mercury in their bodies.

Renewable energy includes all of the following except natural gas. Natural gas is considered a fossil fuel, while geothermal heat, solar energy (the sun), hydropower (rain), and wind energy are all renewable sources.

Acid rain is an example of wet deposition.

As of my last knowledge update in October 2023, oil and gas together typically meet around 80% of the global energy needs. However, the specific percentage can vary based on the source and the year of the data. Among the options you provided, the closest figure would be 79%. Please verify with the most current data for accuracy.

Energy efficiency is the process of using less energy to obtain goods and services.

One of the most important insect pollinators has been honeybees.

Soil texture refers to the relative amounts of sand, silt, and clay in soil.

Proved reserves of a nonrenewable energy source are quantities of fuel that can be recovered using current technology and prices.

This definition indicates that proved reserves are those quantities of energy resources that are known to exist and can be extracted economically with the technology available at the time.