A positive production externality (also called “external benefit” or “external economy” or “beneficial externality”) is the positive effect an activity imposes on an unrelated third party. A side effect or externality associated with such activity is the pollination of surrounding crops by the bees.

The outcomes that are possible negative externalities are increased traffic in the in the neighborhood surrounding the Factory, and D) pollution from trucks making deliveries to the factory. In economics, a negative externality is a cost that a third party suffers from an economic transaction.

When negative externalities are present, it means the producer does not bear all costs, which results in excess production. With positive externalities, the buyer does not get all the benefits of the good, resulting in decreased production.

There is no apparent relationship between meat consumption and affluence. More affluent nations tend to consume more meat products. Less affluent nations tend to consume more meat because poultry is easy to raise. More affluent nations tend to be net exporters of meat products.

As a summarize, it has done many studies about causes of urban sprawl that the most important factors are population and income growth, low price of land and access to appropriate housing, some advantages such as low price of transportation systems, promotion of commuting network, new centers for job in suburbs, using …

Organic farming is widely considered to be a far more sustainable alternative when it comes to food production. The lack of pesticides and wider variety of plants enhances biodiversity and results in better soil quality and reduced pollution from fertilizer or pesticide run-off.