The popularity of off-grid living is higher now than ever before. According to a recent estimate, there are around 1.7 billion people living off-grid worldwide, and this number is rising each year. Off-the-grid homes do not rely on municipal water supply, natural gas, electrical power grid, or similar utility services. A true "off the grid" house is able to operate independently of all traditional public services. Electrical power can be generated on-site with renewable sources such as solar, wind or geothermal (地热的)energy; with a generator and adequate fuel reserves; or simply done without. Such an electricity system is called a stand-alone power system. On-site water sources can include a well, stream, or lake. Depending on the water source, this may include pumps and/or filtration. Rainwater can also be harvested. Any roof space can be source of water supply. By simply installing a water storage tank, whether that be above or below ground, a large amount of rainwater that would otherwise go to waste can quickly be collected and stored for suitable uses later. In a book entitled How to Live Off-grid, the author lists seven reasons for going off-grid. The top two are saving money, and reducing the carbon footprint. Another is survivalism, which means preparing for emergencies such as disruptions in social order. Others include preparing for the collapse of the oil economy and bringing life back to the countryside. Going off-grid can be done to lower the environmental impact of living, as the typically limited amount of on-site renewable energy available is an incentive to reduce its use. But if energy usage is not reduced, going off-grid actually has a larger environmental impact than using the grid, due to the lower efficiencies of the components. It is often done to residential buildings which are only occasionally occupied, such as vacation cabins, to avoid high initial costs of traditional utility connections. Other people choose to live in houses where the cost of outside utilities is prohibitive, or such a distance away as to be impractical. In situations where grid parity (电网平价)has been reached, it usually becomes cheaper to generate one's own electricity rather than purchasing it from the grid. This depends on equipment costs, the availability of renewable energy sources (such as wind and the sun)and the cost of a grid connection. For example, in certain remote areas a grid connection would be prohibitively expensive, resulting in grid parity being reached immediately. What is the author's attitude toward "off the grid" life? A Positive. B Neutral. C Indifferent. D Negative.

The term "off the grid" refers to living in a self-sufficient manner without reliance on one or more public utilities. The popularity of off-grid living is higher now than ever before. According to a recent estimate, there are around 1.7 billion people living off-grid worldwide, and this number is rising each year.

Off-the-grid homes do not rely on municipal water supply, natural gas, electrical power grid, or similar utility services. A true "off the grid" house is able to operate independently of all traditional public services. Electrical power can be generated on-site with renewable sources such as solar, wind or geothermal (地热的)energy; with a generator and adequate fuel reserves; or simply done without. Such an electricity system is called a stand-alone power system. On-site water sources can include a well, stream, or lake. Depending on the water source, this may include pumps and/or filtration. Rainwater can also be harvested. Any roof space can be source of water supply. By simply installing a water storage tank, whether that be above or below ground, a large amount of rainwater that would otherwise go to waste can quickly be collected and stored for suitable uses later.

In a book entitled How to Live Off-grid, the author lists seven reasons for going off-grid. The top two are saving money, and reducing the carbon footprint. Another is survivalism, which means preparing for emergencies such as disruptions in social order. Others include preparing for the collapse of the oil economy and bringing life back to the countryside.

Going off-grid can be done to lower the environmental impact of living, as the typically limited amount of on-site renewable energy available is an incentive to reduce its use. But if energy usage is not reduced, going off-grid actually has a larger environmental impact than using the grid, due to the lower efficiencies of the components. It is often done to residential buildings which are only occasionally occupied, such as vacation cabins, to avoid high initial costs of traditional utility connections. Other people choose to live in houses where the cost of outside utilities is prohibitive, or such a distance away as to be impractical.

In situations where grid parity (电网平价)has been reached, it usually becomes cheaper to generate one's own electricity rather than purchasing it from the grid. This depends on equipment costs, the availability of renewable energy sources (such as wind and the sun)and the cost of a grid connection. For example, in certain remote areas a grid connection would be prohibitively expensive, resulting in grid parity being reached immediately.

What is the author's attitude toward "off the grid" life?

A Positive.

B Neutral.

C Indifferent.

D Negative.