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Environmental Issues
Information about climatic changes; changes in the environment; and saving the environment.
19,983 Questions
How do humans create greenhouse gases?
- By the burning of fossil fuels (coal, oil and natural gas) in industry, transport and the generation of electricity, which releases carbon dioxide.
- By bad agricultural practices in cattle and rice farming that release methane.
What are environmental concerns about the tiger?
Environmental concerns for tigers include habitat loss due to deforestation and human encroachment, poaching for their valuable skins and body parts, and conflicts with humans over livestock depredation. These factors have contributed to the decline of wild tiger populations.
Can greenhouse gases be beneficial to life on earth?
Yes, greenhouse gases are part of the natural greenhouse effect. The gases absorb the heat coming off the surface of the earth and become warm. This warming has kept the earth warm enough for life for millions of years.
What is the effect of auxin in shoots called?
Greater concentration of auxin in the cells facing light restrict cell elongation whereas on the other side (away from light) more elongation of cells takes place due to optimum amount of auxin. thus, the shoots turn towards light.
Was it a surprise that there was a drought in Australia?
Droughts in Australia are never a surprise. As the second driest continent in the world, Australia is subject to frequent droughts, and it is probably more of a surprise when there isn't a drought.
Is natural gas a renewable or non-renewable resource?
While natural gas is a fossil fuel and not renewable, methane (the main component of natural gas) is recoverable from many industrial processes such as anaerobic digestion and by tapping into gas created by landfill sites, This secondary source is producible as it involves the chemical reduction of biological materials.
c remarkable resource. Remarkable resources are not a recognized category of resources. The other options are known types of resources: reusable resources can be utilized multiple times, renewable resources can be replenished over time, and nonrenewable resources are finite and cannot be easily replaced.
What are stem cutting???
Stem cuttings are the most commonly used method of vegetative propagation. A stem cutting is plant stemincluding a tip (e.g. shoot, twig, sucker, ) or a portion of a stem without the apex that includes one or more nodesremoved from a parent plant and capable of rooting; A stem cutting is used to grow a whole new plant, which is also known as cloning (because you are creating an exact copy of the parent plant, a clone).
The stem sections should be free of diseases and pests. Cut below a node. For tip cutting remove foliage from the bottom half of the stem leaving only few leaves in the top. When a cutting is made, injured xylem and phloem cellsplug the tubes so that precious fluids are not lost. Usually a Callus forms at the cut. Cells near the callus area reorganize to form adventitious roots.
The cutting is then placed into rooting medium so that the base of the cutting is below the surface. Some plants willreproduce readily from cuttings while others take a considerable amount of time and care. Rooting condition may vary considerably in different species but in general the best conditions needed for most kind of cuttings to root comprises high humidity, indirect light and soil temperatures of 20°C to 25° C.
These conditions may be created by keeping cuttings enclosed under glass or in plastic bags in dappled shade. Rooting can take from a few days up to several months. Rooting hormones may be used with this method as they helps to stimulate rooting.
There are different typology of stem cuttings:
Herbaceous cuttings:Are stems or pieces of stems taken from nonwoody plants, such as perennials and houseplants and rooted in the normal way.Softwood cuttings:Are pieces of new growth taken from woody stock plants. These cuttings are taken from first-year branches that have not yet become woody. Flowering shrubs are often propagated by softwood cuttings. Late spring and early summer are the best times for success with this method. Make a diagonal cut. The larger diagonal cut gives more area to develop roots. Keep cuttings in water before moving them into rooting medium. Make cuttings 5-30 cm long with no flowers or buds on them. Larger cuttings produce larger plants sooner. Make cuts slightly below a leaf node , and root in the normal way.Hardwood cuttings:Are taken from tissue which has become woody and the plant is dormant. Cuttings can be taken anytime from late autumn after a killing frost until late winter. Select healthy wood that was produced the previous summer. Several cuttings can be made from the same branch of some shrubs. Make cuts at a slant, 10 to 25 cm long. Basal cuts should be just below a node, while the upper cut should be slightly above a bud. Mark the most terminal end of each cutting with a tag. Bury cuttings vertically in moist vermiculite or sand. Cuttings should not freeze, but must remain cool. A callus will form on the lower cut end during storage. Callus formation indicates that cuttings are ready to root. In spring, remove the cuttings from storage. Plant in a hotbed or other protected site with morning sun exposure or filtered light. Leave 1 to 2 inches of cutting above ground. Keep cuttings moist until a root system forms. Transplant the cuttings the following spring while they are still dormant.Succulent cutting:Growing a cactus and succulents from a stem cutting is usually very easy! But for successfully results some particular precautions are needed, above all avoid to make the most common mistake consisting in planting the cutting before it has callused, this error is often fatal.
CUT: Chose a healthy stem sections. Make a straight, clean cut with a sharp knife. Use a saw for larger plants with woody skeletons. The application of both a rooting hormone as well as fungicide on the cut surfaces helps prevent infection and accelerate rooting. Cactus cuttings root most easily when taken during their natural growth season (usually in warm weather).
DRY & LET CALLUSING: Place the cutting in a cool, dry area out of direct sunlight until the wound is fully callused over. This will take a few days for a small cut surface, or week or month for a large cut surface. Erect stems should be kept erect during this period, or else turned frequently, to prevent formation of roots along the side that is on the bottom, and to prevent possible curvature of the stem. If cuttings stay for a along time out of soil they start spontaneously producing adventitious roots (see photo) when roots are visible the cutting can be successfully planted.
PLANT: Plant the calloused cutting into a container with good drainage holes filled with a well-drained soil mixture just deep enough to hold it upright. The soil mixture should contain enough gravel, coarse sand, perlite, or pumice to ensure good drainage. During cool or humid weather, cactus cuttings should be rooted in an especially well-drained mixture. Rooting is best accomplished with some shade to prevent sunburn of the plant. Cuttings in full sun will require more water and sunburn very easily. For cacti which crawl along the ground or that have long, thin stems and for stapeliads, place the cutting lying down on the surface of the soil mix, directly on top of loose soil. For opuntias, or any other cactus that branches freely, place the pad or stem in the soil or on its side, so that new growth will be clean and upright.
WATER: Water immediately after planting and thereafter every time the planting mix becomes totally dry. Never allow the planting mix to remain totally dry for more than a few days. Over watering is the most common problem with growing cactus. Remember, these plants live in areas which have very little annual rainfall and the main reason for rooting failure is rot especially in cool or humid months when soil does not dry out quickly. In cool weather, it may not be necessary to water the plant after the initial watering until the weather begins to turn warm. Winter is "dormant" season for cactus. Do not water unless plant looks noticeably shrivelled.. Water held by the cactus stems can freeze, killing the entire plant, and will also cause root rot and fungus problems Keeps cacti dry and cool during winter is essential. Do not allow water to collect into a saucer beneath the pot, cactus roots do not like continued exposure to moisture.
CHECK: Cactus will begin to root in anywhere form 2 to 6 weeks. When roots have established, the plant will then start to show new growth. Check for roots every two weeks by gently moving the plant in the soil, using tongs or wearing gloves. If there is strong resistance, the cutting is rooted. New growth is evidence that rooting has occurred, but sudden swelling (turgor) of the stem is better proof that water-absorbing roots are present. As long as the cutting still contains moisture, and is not diseased, it still has the potential to eventually make roots, even if it is somewhat shriveled.
You can help lions by supporting conservation organizations that work to protect their habitats, spreading awareness about their plight, and promoting responsible tourism practices that do not harm or exploit these magnificent animals.
What is the advantage and disadvantage of hedgerows?
Advantage: Hedgerows provide habitat for wildlife, act as windbreaks, reduce soil erosion, and improve biodiversity by creating corridors for different species to move through.
Disadvantage: Hedgerows can require regular maintenance to prevent them from becoming overgrown and losing their effectiveness as wildlife habitat or windbreaks. They may also take up valuable land that could be used for agricultural purposes.
Why is sediment yield an important consideration in a discussion of water supplies?
Sediment yield affects water quality by carrying pollutants and nutrients, which can impact drinking water sources. It also affects water storage capacity in reservoirs by reducing their efficiency and lifespan. Therefore, understanding sediment yield is crucial for effectively managing water supplies and ensuring sustainable water resources.
To help reduce the environmental impact of cutting trees for timber, special plantations of fast-growing trees are planted, specifically so they can be cut later. When the trees are used, new ones are planted, making plantation timber environmentally sustainable, as no actual forest has to be cut down for it.
Why can't you just throw spacestation trash into space?
The amount of space junk is insignificant in the vastness of space especially compared to the asteroids and rocks that are already out there.
There should, however, be curbs on radioactive materials being sent out as they could, after vast periods of time, end up on another planet. Again we have to remember the vastness of space and the extremely remote chance of it happening but we should try to be ethical.
The amount of rubbish dumped in the oceans is, however, probably more significant and the dumping of nuclear waste and decommissioned nuclear submarines is certainly a serious problem that world leaders hope won't affect them in their lifetime.
But then who would pay hugely more tax to help people in a thousand years time?
What are some examples of the effects of Global Warming?
Three examples of evidence of global warming:
1. The ice sheets at the poles (north and south) are melting and retreating, which can only happen when the temperature is above the freezing point of the ice.
2. The air temperature today is, on average, warmer than the historical average from the late 1800s through about 1950.
3. The weather patterns are becoming more extreme, with more powerful and unusual storms coming earlier or later in the year than what is historically typical. The summers are tending to be warmer and the winters are tending to be colder, and the areas and amounts of precipitation are also shifting. All of these items are predicted based upon an overall warmer atmospheric temperature.
The cause of global warming is human activity, specifically the burning of fossil fuels which releases millions of tons of carbon dioxide into the atmosphere every year. As the amount of carbon dioxide increases in the atmosphere, more of the sun's radiant energy is trapped as heat, causing global warming. Other activities that are contributing to global warming include massive deforestation projects and the emission of methane and several other air pollutants.
Name of the Butterfly with the longest migration?
The Monarch Butterfly travels the longest migration route. Many are worried the population may be suffering declining numbers due to habitat loss. For more details, please see the sites listed below.
How is Humankind contributing to the Negation of the Green House Effect?
Heads Up, Dared to Prove Otherwise: "Too little, Too late."
We are not negating the greenhouse effect. In fact we are increasing its effect by adding more greenhouse gases to the mix. We now have an 'accelerated' greenhouse effect.
What are some of the roles that organisms play in their environment that are so important?
Breathing...this helps in that the oxgyen produced by plants during the daylight is used by animals in respiration and the carbondoxide produced by the animals is used by the plants for photosynthesis....
A cast fossil is formed when an organism dies and leaves an impression in sediment. Over time, this impression can fill with minerals, creating a replica of the organism's shape. The original organism then decays or is washed away, leaving behind the cast fossil.
How do you describe water's polarity?
Due to the uneven distribution of the electron density, water is considered a polar molecule. The oxygen atom is more negatively charged at one end of the water molecule while the hydrogen atom at the other end is positively charged. The net result of these charges gives water its polarity.
How do bio-gases cause -by contributing to- the green house effect?
Bio-gases such as methane and carbon dioxide are greenhouse gases that trap heat in the atmosphere, leading to the greenhouse effect. When these bio-gases are released into the atmosphere from sources like livestock, landfills, and biomass burning, they contribute to the warming of Earth's surface by absorbing and re-emitting infrared radiation. This traps heat and contributes to climate change.
Is there a natural disaster starting with t?
Yes there is. I know 2 natural disasters that starts with 't.' They are 'Tornadoes' and 'Tsunamis.'
The definition of illegal logging?
Illegal Logging is when a company or person cuts down trees for logs with out permission or in a protected environment. or when a logging company uses illegal means to cut. For example clear cutting may be illegal in some areas and a logger would clear cut.
What are Benefits of snake to our environment?
Snakes play a crucial role in regulating the population of rodents and other small animals, helping to maintain a balance in the ecosystem. They also serve as a food source for other predators, contributing to the food web. Additionally, snakes can help control disease by feeding on animals that can spread infections to humans.
Perception of space is a term that means what?
Perception of space refers to an individual's ability to interpret and navigate the physical environment around them, including depth, distance, and orientation. It involves the processing of sensory information from the environment to create a mental representation of space and surroundings. This process is crucial for activities such as spatial awareness, motor coordination, and interaction with the surroundings.
What is the importance of Environmental Geography?
environmental geography is a mix of physical and human geography or so i was taught in school. it can help us understand both our physical earth landforms, weather, natural disasters and human geography how people live, peoples jobs etc......
