28th November 2019

sfgate

17

Why is it better to grow plants in a greenhouse?

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Plants subjected to extreme cold and heat across a 24-hour period do not grow as well as greenhouse plants and stressed plants become stunted over time. The enclosed indoor space greenhouses provide is typically temperature-controlled with heaters and air ventilation for specific plant species, such as food crops.

Thereof, what does a green house do?

Gases in the atmosphere such as carbon dioxide do what the roof of a greenhouse does. During the day, the Sun shines through the atmosphere. Earth's surface warms up in the sunlight. At night, Earth's surface cools, releasing the heat back into the air.

Why is a greenhouse important?

The greenhouse gases absorb some of this energy and radiate much of it back towards the surface whilst the rest is radiated out to space. This plays an important role in keeping the Earth's surface warm and able to sustain life.

How does a green house work?

This system of heating and circulating air helps to create an artificial environment in a greenhouse that can sustain plants when the outdoor temperature is too cool or variable. Heat enters the greenhouse through its covering of glass or plastic and starts to warm the objects, soil and plants inside.

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What kind of plants can be grown in a greenhouse?

A greenhouse is suitable for growing vegetables in a number of ways:

Starting off hardy vegetable plants earlier than outdoors.
Getting earlier harvests of tender plants such as French beans.
Growing tender crops such as aubergines, cucumbers, peppers and chillies and tomatoes through the summer months.

2

How can humans benefit from plants?

Plants make oxygen. One of the materials that plants produce as they make food is oxygen gas. This oxygen gas, which is an important part of the air, is the gas that plants and animals must have in order to stay alive. When people breathe, it is the oxygen that we take out of the air to keep our cells and bodies alive.

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How does a greenhouse work to help plants grow?

Plants subjected to extreme cold and heat across a 24-hour period do not grow as well as greenhouse plants and stressed plants become stunted over time. The enclosed indoor space greenhouses provide is typically temperature-controlled with heaters and air ventilation for specific plant species, such as food crops.

4

What does a green house do?

Gases in the atmosphere such as carbon dioxide do what the roof of a greenhouse does. During the day, the Sun shines through the atmosphere. Earth's surface warms up in the sunlight. At night, Earth's surface cools, releasing the heat back into the air.

5

Why is greenhouse important?

The greenhouse gases absorb some of this energy and radiate much of it back towards the surface whilst the rest is radiated out to space. This plays an important role in keeping the Earth's surface warm and able to sustain life.

6

Can you grow fruits and vegetables in a greenhouse year round?

Yet here are green vegetables, kale and lettuce, growing in near-90 degree temperatures. They're thriving in a specialized "deep winter" greenhouse, letting farmers Tom Prieve and Sue Wika grow fresh vegetables year round -- without a crushing electric bill. Their plants survive largely on natural winter light.

7

Do you need a heater in a greenhouse?

Heating. If you live in a cold climate you may need to insulate your greenhouse to help keep your plants toasty warm. While a lot of sun will come in during the day, an uninsulated greenhouse will cool off quickly at night. In this case, a heating system may be called for (see Greenhouse Heating Requirements).

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What is the use of a greenhouse?

Special greenhouse varieties of certain crops, such as tomatoes, are generally used for commercial production. Many vegetables and flowers can be grown in greenhouses in late winter and early spring, and then transplanted outside as the weather warms.

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Is a green house gas?

A greenhouse gas is a gas in an atmosphere that absorbs and emits radiant energy within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone.

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How does a greenhouse work physics?

A greenhouse is a building that is heated with solar radiation, such that it can stay warm even during cold days of winter. Light from the Sun passes through the glass roof to heat plants and the ground inside the greenhouse. These objects then emit infrared radiation, which is absorbed in the glass roof.

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What is the meaning of the greenhouse effect?

The greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases. The absorbed energy warms the atmosphere and the surface of the Earth.

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What is the greenhouse gas emissions?

A greenhouse gas is any gaseous compound in the atmosphere that is capable of absorbing infrared radiation, thereby trapping and holding heat in the atmosphere. By increasing the heat in the atmosphere, greenhouse gases are responsible for the greenhouse effect, which ultimately leads to global warming.

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What is the main cause of the greenhouse effect?

Most climate scientists agree the main cause of the current global warming trend is human expansion of the "greenhouse effect"¹ — warming that results when the atmosphere traps heat radiating from Earth toward space. Certain gases in the atmosphere block heat from escaping.

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What is the main source of greenhouse gases?

One of them is through human activities. The main human sources of greenhouse gas emissions are: fossil fuel use, deforestation, intensive livestock farming, use of synthetic fertilizers and industrial processes. The other is through natural processes like animal and plant respiration.

15

What are some human activities that produce greenhouse gases?

How human activities produce greenhouse gases

Most important human activities emit greenhouse gases (GHGs).
Carbon dioxide from the burning of fossil fuels is the largest single source of greenhouse gas emissions from human activities.
Most emissions associated with energy use result when fossil fuels are burned.

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How do greenhouse gases affect the environment?

The amount of greenhouse gases in our atmosphere is the highest it has been in the last 3 million years.5 6 This is enhancing the greenhouse effect and making the Earth warmer than normal, which is affecting the planet's weather patterns, creating global warming and climate change.

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What would happen if there were no greenhouse gases?

Without them the Earth would be too cold for us, or any other living thing, to survive. Naturally-occurring greenhouse gases, such as carbon dioxide and methane, allow solar radiation to reach the Earth's surface, while trapping radiation from the Earth on its way back out to space.

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How can we control greenhouse effect?

The following is a list of 10 steps YOU can take to reduce greenhouse gas emissions:

Reduce, Reuse, Recycle.
Use Less Heat and Air Conditioning.
Replace Your Light Bulbs.
Drive Less and Drive Smart.
Buy Energy-Efficient Products.
Use Less Hot Water.
Use the "Off" Switch.
Plant a Tree.

19

How is recycling help greenhouse gases?

Recycling paper reduces emissions of the greenhouse gases that cause global warming in three important ways. 1. Paper recycling prevents methane emissions from landfills. Decomposition of the paper in landfills produces methane, a greenhouse gas with 21 times the heat-trapping power of carbon dioxide (CO₂).

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How do we produce greenhouse gases?

Carbon dioxide (CO₂) makes up the vast majority of greenhouse gas emissions from the sector, but smaller amounts of methane (CH₄) and nitrous oxide (N₂O) are also emitted. These gases are released during the combustion of fossil fuels, such as coal, oil, and natural gas, to produce electricity.

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